CVE-2026-25681 (GCVE-0-2026-25681)

Vulnerability from cvelistv5 – Published: 2026-05-22 15:01 – Updated: 2026-05-22 17:46
VLAI?
Title
Invoking incorrect handling of character references in DOCTYPE nodes in golang.org/x/net/html
Summary
Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.
Severity ?
6.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
Go
References
Impacted products
Vendor Product Version
golang.org/x/net golang.org/x/net/html Affected: 0 , < 0.55.0 (semver)
Create a notification for this product.
Credits
ensy
Show details on NVD website
To clipboard 

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            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 6.1,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "LOW",
              "privilegesRequired": "NONE",
              "scope": "CHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
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        "title": "CISA ADP Vulnrichment"
      }
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        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/net/html",
          "product": "golang.org/x/net/html",
          "programRoutines": [
            {
              "name": "parser.parse"
            },
            {
              "name": "Parse"
            },
            {
              "name": "ParseFragment"
            },
            {
              "name": "ParseFragmentWithOptions"
            },
            {
              "name": "ParseWithOptions"
            }
          ],
          "vendor": "golang.org/x/net",
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              "lessThan": "0.55.0",
              "status": "affected",
              "version": "0",
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      "problemTypes": [
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            {
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
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      "providerMetadata": {
        "dateUpdated": "2026-05-22T15:01:21.975Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/issue/79574"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8"
        },
        {
          "url": "https://go.dev/cl/781703"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5029"
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      ],
      "title": "Invoking  incorrect handling of character references in DOCTYPE nodes in golang.org/x/net/html"
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  "dataVersion": "5.2"
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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