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CVE-2026-3419 Fastify's Missing End Anchor in "subtypeNameReg" Allows Malformed Content-Types to Pass Validation

🗓️ 06 Mar 2026 17:50:58Reported by openjsType 
cvelist
 cvelist
🔗 www.cve.org👁 35 Views

Fastify allows malformed Content-Type with trailing garbage to bypass validation. Fixed in 5.8.1.

Related
Affected
Refs
[
  {
    "vendor": "fastify",
    "product": "fastify",
    "defaultStatus": "unaffected",
    "versions": [
      {
        "versionType": "semver",
        "status": "affected",
        "version": "5.7.2",
        "lessThan": "5.8.1"
      },
      {
        "versionType": "semver",
        "status": "unaffected",
        "version": "5.8.1"
      }
    ],
    "packageURL": "pkg:npm/fastify"
  }
]

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