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CVE-2026-76169 fastify vulnerable to authentication bypass via malformed URLs reaching encapsulated not-found handlers

🗓️ 04 Sep 2026 09:51:03Reported by openjsType 
cvelist
 cvelist
🔗 www.cve.org👁 8 Views

Authentication bypass in fastify 4.0.0-5.12.1 via malformed URLs to encapsulated not-found handlers.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-76169
4 Sep 202609:54
circl
cve
CVE
CVE-2026-76169
4 Sep 202609:51
cve
euvd
EUVD
EUVD-2026-70988
4 Sep 202609:51
euvd
nvd
NVD
CVE-2026-76169
4 Sep 202610:17
nvd
ptsecurity
Positive Technologies
PT-2026-85449
4 Sep 202600:00
ptsecurity
redhatcve
RedhatCVE
CVE-2026-76169
4 Sep 202610:20
redhatcve
vulnrichment
Vulnrichment
CVE-2026-76169 fastify vulnerable to authentication bypass via malformed URLs reaching encapsulated not-found handlers
4 Sep 202609:51
vulnrichment
[
  {
    "vendor": "fastify",
    "product": "fastify",
    "defaultStatus": "unaffected",
    "versions": [
      {
        "versionType": "semver",
        "status": "affected",
        "version": "4.0.0",
        "lessThan": "5.12.2"
      },
      {
        "versionType": "semver",
        "status": "unaffected",
        "version": "5.12.2"
      }
    ],
    "packageURL": "pkg:npm/fastify"
  }
]

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