Search criteria
1 vulnerability by ajv.js
CVE-2025-69873 (GCVE-0-2025-69873)
Vulnerability from cvelistv5 – Published: 2026-02-11 00:00 – Updated: 2026-06-30 03:15
VLAI?
Summary
ajv (Another JSON Schema Validator) before 8.18.0 is vulnerable to Regular Expression Denial of Service (ReDoS) when the $data option is enabled. The pattern keyword accepts runtime data via JSON Pointer syntax ($data reference), which is passed directly to the JavaScript RegExp() constructor without validation. An attacker can inject a malicious regex pattern (e.g., "^(a|a)*$") combined with crafted input to cause catastrophic backtracking. A 31-character payload causes approximately 44 seconds of CPU blocking, with each additional character doubling execution time. This enables complete denial of service with a single HTTP request against any API using ajv with $data: true for dynamic schema validation. This issue is also fixed in version 6.14.0.
Severity ?
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
| URL | Tags | |
|---|---|---|
Impacted products
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"value": "RHSA-2026:10093: Red Hat OpenShift Container Platform 4.19"
},
{
"lang": "en",
"value": "RHSA-2026:6192: Red Hat OpenShift Dev Spaces 3.27"
},
{
"lang": "en",
"value": "RHSA-2026:7314: Red Hat Quay 3.14"
},
{
"lang": "en",
"value": "RHSA-2026:6568: Red Hat Quay 3.15"
},
{
"lang": "en",
"value": "RHSA-2026:6497: Red Hat Quay 3.16"
},
{
"lang": "en",
"value": "RHSA-2026:6567: Red Hat Quay 3.16"
},
{
"lang": "en",
"value": "RHSA-2026:5168: Red Hat Quay 3.9"
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{
"lang": "en",
"value": "RHSA-2026:26214: Red Hat Satellite 6.18"
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{
"lang": "en",
"value": "RHSA-2026:26211: Red Hat Satellite 6.18"
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"time": "2026-02-11T19:01:32.953Z",
"value": "Reported to Red Hat."
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"time": "2026-02-11T00:00:00.000Z",
"value": "Made public."
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"title": "ajv: ReDoS via $data reference",
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"value": "To mitigate this issue, disable the $data feature if your application does not require it. If $data must be used, implement strict validation of the input fields that are referenced by the pattern keyword to ensure they contain only expected and safe characters."
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"url": "https://github.com/EthanKim88/ethan-cve-disclosures/blob/main/CVE-2025-69873-ajv-ReDoS.md"
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