Vulnerability from cleanstart
Published
2026-05-18 13:37
Modified
2026-05-06 14:36
Summary
Security fixes for CVE-2026-33186, CVE-2026-39882, CVE-2026-39883, CVE-2026-40179, ghsa-mqqf-5wvp-8fh8 applied in versions: 1.21.0-r0, 1.21.0-r1
Details
Multiple security vulnerabilities affect the cortex package. These issues are resolved in later releases. See references for individual vulnerability details.
{
"affected": [
{
"package": {
"ecosystem": "CleanStart",
"name": "cortex"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.21.0-r1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"credits": [],
"database_specific": {},
"details": "Multiple security vulnerabilities affect the cortex package. These issues are resolved in later releases. See references for individual vulnerability details.",
"id": "CLEANSTART-2026-MP82813",
"modified": "2026-05-06T14:36:48Z",
"published": "2026-05-18T13:37:10.111102Z",
"references": [
{
"type": "ADVISORY",
"url": "https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-MP82813.json"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-33186"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-39882"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-39883"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-40179"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/ghsa-mqqf-5wvp-8fh8"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33186"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39882"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39883"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40179"
}
],
"related": [],
"schema_version": "1.7.3",
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"upstream": [
"CVE-2026-33186",
"CVE-2026-39882",
"CVE-2026-39883",
"CVE-2026-40179",
"ghsa-mqqf-5wvp-8fh8"
]
}
CVE-2026-40179 (GCVE-0-2026-40179)
Vulnerability from cvelistv5 – Published: 2026-04-15 22:26 – Updated: 2026-04-16 14:21
VLAI?
Title
Prometheus: Stored XSS via metric names and label values in web UI tooltips and metrics explorer
Summary
Prometheus is an open-source monitoring system and time series database. Versions 3.0 through 3.5.1 and 3.6.0 through 3.11.1 have stored cross-site scripting vulnerabilities in multiple components of the Prometheus web UI where metric names and label values are injected into innerHTML without escaping. In both the Mantine UI and old React UI, chart tooltips on the Graph page render metric names containing HTML/JavaScript without sanitization. In the old React UI, the Metric Explorer fuzzy search results use dangerouslySetInnerHTML without escaping, and heatmap cell tooltips interpolate le label values without sanitization. With Prometheus v3.x defaulting to UTF-8 metric and label name validation, characters like <, >, and " are now valid in metric names and labels. An attacker who can inject metrics via a compromised scrape target, remote write, or OTLP receiver endpoint can execute arbitrary JavaScript in the browser of any Prometheus user who views the metric in the Graph UI, potentially enabling configuration exfiltration, data deletion, or Prometheus shutdown depending on enabled flags. This issue has been fixed in versions 3.5.2 and 3.11.2. If developers are unable to immediately update, the following workarounds are recommended: ensure that the remote write receiver (--web.enable-remote-write-receiver) and the OTLP receiver (--web.enable-otlp-receiver) are not exposed to untrusted sources; verify that all scrape targets are trusted and not under attacker control; avoid enabling admin or mutating API endpoints (e.g., --web.enable-admin-api or --web.enable-lifecycle) in environments where untrusted data may be ingested; and refrain from clicking untrusted links, particularly those containing functions such as label_replace, as they may generate poisoned label names and values.
Severity ?
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| prometheus | prometheus |
Affected:
>= 3.0.0, < 3.5.2
Affected: >= 3.6.0, < 3.11.2 Affected: < 0.311.2-0.20260410083055-07c6232d159b |
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CVE-2026-39882 (GCVE-0-2026-39882)
Vulnerability from cvelistv5 – Published: 2026-04-08 20:24 – Updated: 2026-04-09 20:22
VLAI?
Title
OpenTelemetry-Go OTLP HTTP exporters read unbounded HTTP response bodies
Summary
OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to 1.43.0, the otlp HTTP exporters (traces/metrics/logs) read the full HTTP response body into an in-memory bytes.Buffer without a size cap. This is exploitable for memory exhaustion when the configured collector endpoint is attacker-controlled (or a network attacker can mitm the exporter connection). This vulnerability is fixed in 1.43.0.
Severity ?
5.3 (Medium)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| open-telemetry | opentelemetry-go |
Affected:
< 1.43.0
|
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CVE-2026-39883 (GCVE-0-2026-39883)
Vulnerability from cvelistv5 – Published: 2026-04-08 20:26 – Updated: 2026-07-01 12:05
VLAI?
Title
OpenTelemetry-Go has an incomplete fix for CVE-2026-24051: BSD kenv command not using absolute path enables PATH hijacking
Summary
OpenTelemetry-Go is the Go implementation of OpenTelemetry. From 1.15.0 to 1.42.0, the fix for CVE-2026-24051 changed the Darwin ioreg command to use an absolute path but left the BSD kenv command using a bare name, allowing the same PATH hijacking attack on BSD and Solaris platforms. This vulnerability is fixed in 1.43.0.
Severity ?
CWE
- CWE-426 - Untrusted Search Path
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| open-telemetry | opentelemetry-go |
Affected:
>= 1.15.0, < 1.43.0
|
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"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
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"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-39883",
"datePublished": "2026-04-08T20:26:41.731Z",
"dateReserved": "2026-04-07T20:32:03.010Z",
"dateUpdated": "2026-07-01T12:05:04.887Z",
"state": "PUBLISHED"
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"dataType": "CVE_RECORD",
"dataVersion": "5.2"
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CVE-2026-33186 (GCVE-0-2026-33186)
Vulnerability from cvelistv5 – Published: 2026-03-20 22:23 – Updated: 2026-07-03 12:04
VLAI?
Title
gRPC-Go has an authorization bypass via missing leading slash in :path
Summary
gRPC-Go is the Go language implementation of gRPC. Versions prior to 1.79.3 have an authorization bypass resulting from improper input validation of the HTTP/2 `:path` pseudo-header. The gRPC-Go server was too lenient in its routing logic, accepting requests where the `:path` omitted the mandatory leading slash (e.g., `Service/Method` instead of `/Service/Method`). While the server successfully routed these requests to the correct handler, authorization interceptors (including the official `grpc/authz` package) evaluated the raw, non-canonical path string. Consequently, "deny" rules defined using canonical paths (starting with `/`) failed to match the incoming request, allowing it to bypass the policy if a fallback "allow" rule was present. This affects gRPC-Go servers that use path-based authorization interceptors, such as the official RBAC implementation in `google.golang.org/grpc/authz` or custom interceptors relying on `info.FullMethod` or `grpc.Method(ctx)`; AND that have a security policy contains specific "deny" rules for canonical paths but allows other requests by default (a fallback "allow" rule). The vulnerability is exploitable by an attacker who can send raw HTTP/2 frames with malformed `:path` headers directly to the gRPC server. The fix in version 1.79.3 ensures that any request with a `:path` that does not start with a leading slash is immediately rejected with a `codes.Unimplemented` error, preventing it from reaching authorization interceptors or handlers with a non-canonical path string. While upgrading is the most secure and recommended path, users can mitigate the vulnerability using one of the following methods: Use a validating interceptor (recommended mitigation); infrastructure-level normalization; and/or policy hardening.
Severity ?
9.1 (Critical)
CWE
- CWE-285 - Improper Authorization
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
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"lang": "en",
"value": "RHSA-2026:7128: Red Hat Advanced Cluster Security for Kubernetes 4.9"
},
{
"lang": "en",
"value": "RHSA-2026:13791: Red Hat Advanced Cluster Security for Kubernetes 4.9"
},
{
"lang": "en",
"value": "RHSA-2026:27893: Red Hat Container Native Virtualization 4.18"
},
{
"lang": "en",
"value": "RHSA-2026:27901: Red Hat Container Native Virtualization 4.19"
},
{
"lang": "en",
"value": "RHSA-2026:27957: Red Hat Container Native Virtualization 4.20"
},
{
"lang": "en",
"value": "RHSA-2026:27892: Red Hat Container Native Virtualization 4.21"
},
{
"lang": "en",
"value": "RHSA-2026:6174: Red Hat Developer Hub 1.8"
},
{
"lang": "en",
"value": "RHSA-2026:6802: Red Hat Developer Hub 1.9"
},
{
"lang": "en",
"value": "RHSA-2026:22485: Red Hat Lightspeed (formerly Insights) for Runtimes 1"
},
{
"lang": "en",
"value": "RHSA-2026:24977: Red Hat OpenShift AI 2.25"
},
{
"lang": "en",
"value": "RHSA-2026:10698: Red Hat OpenShift AI 2.25"
},
{
"lang": "en",
"value": "RHSA-2026:19712: Red Hat OpenShift AI 3.3"
},
{
"lang": "en",
"value": "RHSA-2026:10155: Red Hat OpenShift Builds 1.6.5"
},
{
"lang": "en",
"value": "RHSA-2026:10158: Red Hat OpenShift Builds 1.7.3"
},
{
"lang": "en",
"value": "RHSA-2026:21696: Red Hat OpenShift Container Platform 4.12"
},
{
"lang": "en",
"value": "RHSA-2026:21697: Red Hat OpenShift Container Platform 4.12"
},
{
"lang": "en",
"value": "RHSA-2026:12283: Red Hat OpenShift Container Platform 4.12"
},
{
"lang": "en",
"value": "RHSA-2026:21691: Red Hat OpenShift Container Platform 4.13"
},
{
"lang": "en",
"value": "RHSA-2026:21692: Red Hat OpenShift Container Platform 4.13"
},
{
"lang": "en",
"value": "RHSA-2026:28893: Red Hat OpenShift Container Platform 4.14"
},
{
"lang": "en",
"value": "RHSA-2026:25009: Red Hat OpenShift Container Platform 4.14"
},
{
"lang": "en",
"value": "RHSA-2026:15092: Red Hat OpenShift Container Platform 4.14"
},
{
"lang": "en",
"value": "RHSA-2026:23234: Red Hat OpenShift Container Platform 4.15"
},
{
"lang": "en",
"value": "RHSA-2026:28964: Red Hat OpenShift Container Platform 4.15"
},
{
"lang": "en",
"value": "RHSA-2026:23235: Red Hat OpenShift Container Platform 4.15"
},
{
"lang": "en",
"value": "RHSA-2026:14775: Red Hat OpenShift Container Platform 4.15"
},
{
"lang": "en",
"value": "RHSA-2026:25045: Red Hat OpenShift Container Platform 4.16"
},
{
"lang": "en",
"value": "RHSA-2026:29082: Red Hat OpenShift Container Platform 4.16"
},
{
"lang": "en",
"value": "RHSA-2026:20088: Red Hat OpenShift Container Platform 4.16"
},
{
"lang": "en",
"value": "RHSA-2026:20089: Red Hat OpenShift Container Platform 4.16"
},
{
"lang": "en",
"value": "RHSA-2026:10105: Red Hat OpenShift Container Platform 4.16"
},
{
"lang": "en",
"value": "RHSA-2026:17598: Red Hat OpenShift Container Platform 4.17"
},
{
"lang": "en",
"value": "RHSA-2026:17599: Red Hat OpenShift Container Platform 4.17"
},
{
"lang": "en",
"value": "RHSA-2026:21657: Red Hat OpenShift Container Platform 4.18"
},
{
"lang": "en",
"value": "RHSA-2026:25182: Red Hat OpenShift Container Platform 4.18"
},
{
"lang": "en",
"value": "RHSA-2026:21658: Red Hat OpenShift Container Platform 4.18"
},
{
"lang": "en",
"value": "RHSA-2026:27001: Red Hat OpenShift Container Platform 4.18"
},
{
"lang": "en",
"value": "RHSA-2026:17448: Red Hat OpenShift Container Platform 4.18"
},
{
"lang": "en",
"value": "RHSA-2026:25183: Red Hat OpenShift Container Platform 4.18"
},
{
"lang": "en",
"value": "RHSA-2026:12119: Red Hat OpenShift Container Platform 4.18"
},
{
"lang": "en",
"value": "RHSA-2026:12118: Red Hat OpenShift Container Platform 4.18"
},
{
"lang": "en",
"value": "RHSA-2026:8449: Red Hat OpenShift Container Platform 4.18"
},
{
"lang": "en",
"value": "RHSA-2026:23246: Red Hat OpenShift Container Platform 4.19"
},
{
"lang": "en",
"value": "RHSA-2026:20041: Red Hat OpenShift Container Platform 4.19"
},
{
"lang": "en",
"value": "RHSA-2026:20042: Red Hat OpenShift Container Platform 4.19"
},
{
"lang": "en",
"value": "RHSA-2026:27004: Red Hat OpenShift Container Platform 4.19"
},
{
"lang": "en",
"value": "RHSA-2026:23247: Red Hat OpenShift Container Platform 4.19"
},
{
"lang": "en",
"value": "RHSA-2026:25201: Red Hat OpenShift Container Platform 4.19"
},
{
"lang": "en",
"value": "RHSA-2026:10093: Red Hat OpenShift Container Platform 4.19"
},
{
"lang": "en",
"value": "RHSA-2026:10094: Red Hat OpenShift Container Platform 4.19"
},
{
"lang": "en",
"value": "RHSA-2026:21703: Red Hat OpenShift Container Platform 4.20"
},
{
"lang": "en",
"value": "RHSA-2026:27063: Red Hat OpenShift Container Platform 4.20"
},
{
"lang": "en",
"value": "RHSA-2026:17468: Red Hat OpenShift Container Platform 4.20"
},
{
"lang": "en",
"value": "RHSA-2026:24535: Red Hat OpenShift Container Platform 4.20"
},
{
"lang": "en",
"value": "RHSA-2026:21704: Red Hat OpenShift Container Platform 4.20"
},
{
"lang": "en",
"value": "RHSA-2026:25195: Red Hat OpenShift Container Platform 4.20"
},
{
"lang": "en",
"value": "RHSA-2026:25194: Red Hat OpenShift Container Platform 4.20"
},
{
"lang": "en",
"value": "RHSA-2026:6564: Red Hat OpenShift Container Platform 4.20"
},
{
"lang": "en",
"value": "RHSA-2026:24759: Red Hat OpenShift Container Platform 4.20"
},
{
"lang": "en",
"value": "RHSA-2026:17474: Red Hat OpenShift Container Platform 4.21"
},
{
"lang": "en",
"value": "RHSA-2026:21709: Red Hat OpenShift Container Platform 4.21"
},
{
"lang": "en",
"value": "RHSA-2026:24506: Red Hat OpenShift Container Platform 4.21"
},
{
"lang": "en",
"value": "RHSA-2026:20034: Red Hat OpenShift Container Platform 4.21"
},
{
"lang": "en",
"value": "RHSA-2026:20035: Red Hat OpenShift Container Platform 4.21"
},
{
"lang": "en",
"value": "RHSA-2026:25187: Red Hat OpenShift Container Platform 4.21"
},
{
"lang": "en",
"value": "RHSA-2026:7245: Red Hat OpenShift Container Platform 4.21"
},
{
"lang": "en",
"value": "RHSA-2026:23241: Red Hat OpenShift Container Platform 4.21"
},
{
"lang": "en",
"value": "RHSA-2026:17475: Red Hat OpenShift Container Platform 4.21"
},
{
"lang": "en",
"value": "RHSA-2026:21710: Red Hat OpenShift Container Platform 4.21"
},
{
"lang": "en",
"value": "RHSA-2026:22800: Red Hat OpenShift Container Platform 4.21"
},
{
"lang": "en",
"value": "RHSA-2026:10175: Red Hat OpenShift Dev Spaces 3.27"
},
{
"lang": "en",
"value": "RHSA-2026:20946: Red Hat OpenShift GitOps 1.18"
},
{
"lang": "en",
"value": "RHSA-2026:20943: Red Hat OpenShift GitOps 1.19"
},
{
"lang": "en",
"value": "RHSA-2026:26519: Red Hat OpenShift Pipelines 1.21"
},
{
"lang": "en",
"value": "RHSA-2026:24484: Red Hat OpenShift Pipelines 1.21"
},
{
"lang": "en",
"value": "RHSA-2026:21932: Red Hat OpenShift Pipelines 1.2"
},
{
"lang": "en",
"value": "RHSA-2026:21931: Red Hat OpenShift Pipelines 1.2"
},
{
"lang": "en",
"value": "RHSA-2026:8483: Red Hat OpenShift Service Mesh 2.6"
},
{
"lang": "en",
"value": "RHSA-2026:9440: Red Hat OpenShift Service Mesh 3.0"
},
{
"lang": "en",
"value": "RHSA-2026:8484: Red Hat OpenShift Service Mesh 3.0"
},
{
"lang": "en",
"value": "RHSA-2026:9448: Red Hat OpenShift Service Mesh 3.1"
},
{
"lang": "en",
"value": "RHSA-2026:8490: Red Hat OpenShift Service Mesh 3.1"
},
{
"lang": "en",
"value": "RHSA-2026:9453: Red Hat OpenShift Service Mesh 3.2"
},
{
"lang": "en",
"value": "RHSA-2026:8491: Red Hat OpenShift Service Mesh 3.2"
},
{
"lang": "en",
"value": "RHSA-2026:8493: Red Hat OpenShift Service Mesh 3.3"
},
{
"lang": "en",
"value": "RHSA-2026:9388: Red Hat OpenShift distributed tracing 3.9.3"
},
{
"lang": "en",
"value": "RHSA-2026:9385: Red Hat OpenShift distributed tracing 3.9.3"
},
{
"lang": "en",
"value": "RHSA-2026:26416: Red Hat Openshift Data Foundation 4.16"
},
{
"lang": "en",
"value": "RHSA-2026:26420: Red Hat Openshift Data Foundation 4.18"
},
{
"lang": "en",
"value": "RHSA-2026:26413: Red Hat Openshift Data Foundation 4.19"
},
{
"lang": "en",
"value": "RHSA-2026:12279: Red Hat Openshift Data Foundation 4.19"
},
{
"lang": "en",
"value": "RHSA-2026:26412: Red Hat Openshift Data Foundation 4.2"
},
{
"lang": "en",
"value": "RHSA-2026:12277: Red Hat Openshift Data Foundation 4.2"
},
{
"lang": "en",
"value": "RHSA-2026:11916: Red Hat Quay 3.10"
},
{
"lang": "en",
"value": "RHSA-2026:11856: Red Hat Quay 3.12"
},
{
"lang": "en",
"value": "RHSA-2026:21017: Red Hat Quay 3.14"
},
{
"lang": "en",
"value": "RHSA-2026:24853: Red Hat Quay 3.15"
},
{
"lang": "en",
"value": "RHSA-2026:19375: Red Hat Quay 3.16"
},
{
"lang": "en",
"value": "RHSA-2026:22465: Red Hat Quay 3.17"
},
{
"lang": "en",
"value": "RHSA-2026:11996: Red Hat Quay 3.9"
},
{
"lang": "en",
"value": "RHSA-2026:10131: Red Hat Trusted Artifact Signer 1.3"
},
{
"lang": "en",
"value": "RHSA-2026:10125: Red Hat Trusted Artifact Signer 1.3"
},
{
"lang": "en",
"value": "RHSA-2026:10130: Red Hat Trusted Artifact Signer 1.3"
},
{
"lang": "en",
"value": "RHSA-2026:10126: Red Hat Trusted Artifact Signer 1.3"
},
{
"lang": "en",
"value": "RHSA-2026:10172: Red Hat Trusted Artifact Signer 1.3"
},
{
"lang": "en",
"value": "RHSA-2026:10153: Red Hat Trusted Artifact Signer 1.3"
},
{
"lang": "en",
"value": "RHSA-2026:8338: Red Hat Web Terminal 1.13"
},
{
"lang": "en",
"value": "RHSA-2026:22959: Red Hat Web Terminal 1.14"
},
{
"lang": "en",
"value": "RHSA-2026:22961: Red Hat Web Terminal 1.15"
},
{
"lang": "en",
"value": "RHSA-2026:24536: multicluster engine for Kubernetes 2.10"
},
{
"lang": "en",
"value": "RHSA-2026:19099: multicluster engine for Kubernetes 2.10"
},
{
"lang": "en",
"value": "RHSA-2026:12116: multicluster engine for Kubernetes 2.10"
},
{
"lang": "en",
"value": "RHSA-2026:12337: multicluster engine for Kubernetes 2.11"
},
{
"lang": "en",
"value": "RHSA-2026:19108: multicluster engine for Kubernetes 2.11"
},
{
"lang": "en",
"value": "RHSA-2026:17459: multicluster engine for Kubernetes 2.6"
},
{
"lang": "en",
"value": "RHSA-2026:17123: multicluster engine for Kubernetes 2.8"
},
{
"lang": "en",
"value": "RHSA-2026:22689: multicluster engine for Kubernetes 2.8"
},
{
"lang": "en",
"value": "RHSA-2026:18585: multicluster engine for Kubernetes 2.9"
},
{
"lang": "en",
"value": "RHSA-2026:19109: multicluster engine for Kubernetes 2.9"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-03-20T23:02:27.802Z",
"value": "Reported to Red Hat."
},
{
"lang": "en",
"time": "2026-03-20T22:23:32.147Z",
"value": "Made public."
}
],
"title": "google.golang.org/grpc/grpc-go: google.golang.org/grpc/authz: gRPC-Go: Authorization bypass due to improper HTTP/2 path validation",
"workarounds": [
{
"lang": "en",
"value": "To mitigate this issue, implement infrastructure-level normalization to ensure all incoming HTTP/2 `:path` headers are properly formatted with a leading slash before reaching the gRPC-Go server. This can be achieved by configuring a reverse proxy or API gateway to validate and normalize the `:path` header. Ensure that any such intermediary is properly configured and restarted to apply the changes, which may temporarily impact service availability."
}
],
"x_adpType": "supplier",
"x_generator": {
"engine": "sadp-cli 1.0.0"
}
}
],
"cna": {
"affected": [
{
"product": "grpc-go",
"vendor": "grpc",
"versions": [
{
"status": "affected",
"version": "\u003c 1.79.3"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "gRPC-Go is the Go language implementation of gRPC. Versions prior to 1.79.3 have an authorization bypass resulting from improper input validation of the HTTP/2 `:path` pseudo-header. The gRPC-Go server was too lenient in its routing logic, accepting requests where the `:path` omitted the mandatory leading slash (e.g., `Service/Method` instead of `/Service/Method`). While the server successfully routed these requests to the correct handler, authorization interceptors (including the official `grpc/authz` package) evaluated the raw, non-canonical path string. Consequently, \"deny\" rules defined using canonical paths (starting with `/`) failed to match the incoming request, allowing it to bypass the policy if a fallback \"allow\" rule was present. This affects gRPC-Go servers that use path-based authorization interceptors, such as the official RBAC implementation in `google.golang.org/grpc/authz` or custom interceptors relying on `info.FullMethod` or `grpc.Method(ctx)`; AND that have a security policy contains specific \"deny\" rules for canonical paths but allows other requests by default (a fallback \"allow\" rule). The vulnerability is exploitable by an attacker who can send raw HTTP/2 frames with malformed `:path` headers directly to the gRPC server. The fix in version 1.79.3 ensures that any request with a `:path` that does not start with a leading slash is immediately rejected with a `codes.Unimplemented` error, preventing it from reaching authorization interceptors or handlers with a non-canonical path string. While upgrading is the most secure and recommended path, users can mitigate the vulnerability using one of the following methods: Use a validating interceptor (recommended mitigation); infrastructure-level normalization; and/or policy hardening."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 9.1,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-285",
"description": "CWE-285: Improper Authorization",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-20T22:23:32.147Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/grpc/grpc-go/security/advisories/GHSA-p77j-4mvh-x3m3",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/grpc/grpc-go/security/advisories/GHSA-p77j-4mvh-x3m3"
}
],
"source": {
"advisory": "GHSA-p77j-4mvh-x3m3",
"discovery": "UNKNOWN"
},
"title": "gRPC-Go has an authorization bypass via missing leading slash in :path"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-33186",
"datePublished": "2026-03-20T22:23:32.147Z",
"dateReserved": "2026-03-17T22:16:36.720Z",
"dateUpdated": "2026-07-03T12:04:52.878Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
GHSA-MQQF-5WVP-8FH8
Vulnerability from github – Published: 2026-01-14 21:18 – Updated: 2026-06-18 13:02
VLAI?
Summary
chi has an open redirect vulnerability in the RedirectSlashes middleware
Details
Summary
The RedirectSlashes function in middleware/strip.go does not perform correct input validation and can lead to an open redirect vulnerability.
Details
The RedirectSlashes function performs a Trim to all forward slash (/) characters, while prepending a single one at the begining of the path (Line 52).
However, it does not trim backslashes (\).
File: middleware/strip.go
41: func RedirectSlashes(next http.Handler) http.Handler {
...
51: // Trim all leading and trailing slashes (e.g., "//evil.com", "/some/path//")
52: path = "/" + strings.Trim(path, "/")
...
62: }
Also, from version 5.2.2 onwards the RedirectSlashes function does not take into consideration the Host Header in the redirect response returned. This was done in order to combat another [vulnerability](https://github.com/go-chi/chi/security/advisories/GHSA-vrw8-fxc6-2r93).
The above make it possible for a response in the following form:
HTTP/1.1 301 Moved Permanently
Location: /\evil.com
The /\evil.com will be transformed by most browsers (Chrome, Firefox, etc. not Safari) into //evil.com which is a protocol relative URL and will result in a redirect to evil.com, essentially making it an open redirect vulnerability.
PoC
A minimal working example can be seen below.
package main
import (
"fmt"
"net/http"
"github.com/go-chi/chi/v5"
"github.com/go-chi/chi/v5/middleware"
)
func main() {
r := chi.NewRouter()
r.Use(middleware.RedirectSlashes)
r.Get("/*", func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusOK)
})
fmt.Println("Server starting on port 8081...")
if err := http.ListenAndServe(":8081", r); err != nil {
fmt.Printf("Error starting server: %v\n", err)
}
}
And when we request the path /\evil.com (needs a second backslash or URL encoding in the terminal), the HTTP Redirect Location is just /\evil.com without any domain/Host information.
$ curl -I localhost:8081/\\evil.com/
HTTP/1.1 301 Moved Permanently
Content-Type: text/html; charset=utf-8
Location: /\evil.com
$ curl -I localhost:8081/%5Cevil.com/
HTTP/1.1 301 Moved Permanently
Content-Type: text/html; charset=utf-8
Location: /\evil.com
This opened in a browser (Chrome, Firefox) will result in a transformation to //evil.com which in turn will result in a redirect to evil.com.
Impact
This essentially consists of an open redirect vulnerability, provided that victim users use the most popular browsers (Chrome, Firefox, etc. It does not work in e.g. Safari).
The attacker can construct a malicious URL on a domain of a legitimate website and send it to the victim user. The victim users thinking that they will click on a legitimate website's URL, they will unknowingly be reidrected to an attacker controlled website.
This can lead to credential theft if the victim gets redirected to a phishing website, to malware that is hosted on the attacker controlled website etc. Also, it has a greate reputation / business impact for the affected legitimate website.
In order to exploit this vulnerability the attacker does not need to be authenticated or have ay other priviledge / knowledge regarding the affected application.
CVSS Score: 4.7 (Medium)
Severity ?
4.7 (Medium)
{
"affected": [
{
"package": {
"ecosystem": "Go",
"name": "github.com/go-chi/chi/v5"
},
"ranges": [
{
"events": [
{
"introduced": "5.2.2"
},
{
"fixed": "5.2.4"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2025-69725"
],
"database_specific": {
"cwe_ids": [
"CWE-601"
],
"github_reviewed": true,
"github_reviewed_at": "2026-01-14T21:18:06Z",
"nvd_published_at": null,
"severity": "MODERATE"
},
"details": "### Summary\n\nThe `RedirectSlashes` function in middleware/strip.go does not perform correct input validation and can lead to an open redirect vulnerability.\n\n### Details\n\nThe `RedirectSlashes` function performs a `Trim` to all forward slash (`/`) characters, while prepending a single one at the begining of the path (Line 52).\n\nHowever, it does not trim backslashes (`\\`).\n\n```go\nFile: middleware/strip.go\n41: func RedirectSlashes(next http.Handler) http.Handler {\n...\n51: \t\t\t// Trim all leading and trailing slashes (e.g., \"//evil.com\", \"/some/path//\")\n52: \t\t\tpath = \"/\" + strings.Trim(path, \"/\")\n...\n62: }\n```\n\nAlso, from version 5.2.2 onwards the `RedirectSlashes` function does not take into consideration the `Host` Header in the redirect response returned. This was done in order to combat another [[vulnerability](https://github.com/go-chi/chi/security/advisories/GHSA-vrw8-fxc6-2r93)](https://github.com/go-chi/chi/security/advisories/GHSA-vrw8-fxc6-2r93).\n\nThe above make it possible for a response in the following form:\n\n```\nHTTP/1.1 301 Moved Permanently\nLocation: /\\evil.com\n```\n\nThe `/\\evil.com` will be transformed by most browsers (Chrome, Firefox, etc. not Safari) into `//evil.com` which is a protocol relative URL and will result in a redirect to `evil.com`, essentially making it an open redirect vulnerability.\n\n### PoC\n\nA minimal working example can be seen below.\n\n```go\npackage main\n\nimport (\n\t\"fmt\"\n\t\"net/http\"\n\n\t\"github.com/go-chi/chi/v5\"\n\t\"github.com/go-chi/chi/v5/middleware\"\n)\n\n\n\nfunc main() {\n\tr := chi.NewRouter()\n\n\tr.Use(middleware.RedirectSlashes)\n\n\tr.Get(\"/*\", func(w http.ResponseWriter, r *http.Request) {\n\t\tw.WriteHeader(http.StatusOK)\n\t})\n\n\tfmt.Println(\"Server starting on port 8081...\")\n\tif err := http.ListenAndServe(\":8081\", r); err != nil {\n\t\tfmt.Printf(\"Error starting server: %v\\n\", err)\n\t}\n}\n\n```\n\nAnd when we request the path `/\\evil.com` (needs a second backslash or URL encoding in the terminal), the HTTP Redirect Location is just `/\\evil.com` without any domain/Host information.\n\n```bash\n$ curl -I localhost:8081/\\\\evil.com/\nHTTP/1.1 301 Moved Permanently\nContent-Type: text/html; charset=utf-8\nLocation: /\\evil.com\n```\n\n```bash\n$ curl -I localhost:8081/%5Cevil.com/\nHTTP/1.1 301 Moved Permanently\nContent-Type: text/html; charset=utf-8\nLocation: /\\evil.com\n```\n\nThis opened in a browser (Chrome, Firefox) will result in a transformation to `//evil.com` which in turn will result in a redirect to `evil.com`.\n\u003cimg width=\"200\" alt=\"image-20250829115619807\" src=\"https://github.com/user-attachments/assets/44aedad1-64b6-4660-8b26-fad9b4eca036\" /\u003e\n\n\n\u003cimg width=\"200\" alt=\"image-20250829115632067\" src=\"https://github.com/user-attachments/assets/b976d47d-1975-469c-abd3-deb907a68db2\" /\u003e\n\n\n### Impact\n\nThis essentially consists of an open redirect vulnerability, provided that victim users use the most popular browsers (Chrome, Firefox, etc. It does not work in e.g. Safari).\n\nThe attacker can construct a malicious URL on a domain of a legitimate website and send it to the victim user. The victim users thinking that they will click on a legitimate website\u0027s URL, they will unknowingly be reidrected to an attacker controlled website.\n\nThis can lead to credential theft if the victim gets redirected to a phishing website, to malware that is hosted on the attacker controlled website etc. Also, it has a greate reputation / business impact for the affected legitimate website.\n\nIn order to exploit this vulnerability the attacker does not need to be authenticated or have ay other priviledge / knowledge regarding the affected application.\n\nCVSS Score: [4.7 (Medium)](https://www.first.org/cvss/calculator/3-0#CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N)",
"id": "GHSA-mqqf-5wvp-8fh8",
"modified": "2026-06-18T13:02:20Z",
"published": "2026-01-14T21:18:06Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/go-chi/chi/security/advisories/GHSA-mqqf-5wvp-8fh8"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-69725"
},
{
"type": "WEB",
"url": "https://github.com/go-chi/chi/issues/1037"
},
{
"type": "WEB",
"url": "https://github.com/go-chi/chi/commit/6eb35881c0e438ffb663ddbad3a61babaa5e5d8a"
},
{
"type": "PACKAGE",
"url": "https://github.com/go-chi/chi"
},
{
"type": "WEB",
"url": "http://go-chichi.com"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N",
"type": "CVSS_V3"
}
],
"summary": "chi has an open redirect vulnerability in the RedirectSlashes middleware"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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