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CVE-2026-86472 fast-uri vulnerable to inconsistent host case normalization via percent-encoded octets

🗓️ 15 Sep 2026 10:29:50Reported by openjsType 
cvelist
 cvelist
🔗 www.cve.org👁 4 Views

fast-uri is a dependency-free RFC 3986 URI parser for Node.js, used by Fastify and ajv. In versions before 2.4.7, from 3.0.0 through 3.1.7, and from 4.0.0 through 4.1.4, fast-uri folds the host to lowercase before it percent-decodes the host, so a...

Related
Affected
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-86472
15 Sep 202610:34
circl
cve
CVE
CVE-2026-86472
15 Sep 202610:29
cve
euvd
EUVD
EUVD-2026-78395
15 Sep 202610:29
euvd
nvd
NVD
CVE-2026-86472
15 Sep 202611:17
nvd
ptsecurity
Positive Technologies
PT-2026-91922
15 Sep 202600:00
ptsecurity
redhatcve
RedhatCVE
CVE-2026-86472
15 Sep 202611:15
redhatcve
vulnrichment
Vulnrichment
CVE-2026-86472 fast-uri vulnerable to inconsistent host case normalization via percent-encoded octets
15 Sep 202610:29
vulnrichment
[
  {
    "vendor": "fast-uri",
    "product": "fast-uri",
    "defaultStatus": "unaffected",
    "versions": [
      {
        "versionType": "semver",
        "status": "affected",
        "version": "0",
        "lessThan": "2.4.7"
      },
      {
        "versionType": "semver",
        "status": "unaffected",
        "version": "2.4.7"
      },
      {
        "versionType": "semver",
        "status": "affected",
        "version": "3.0.0",
        "lessThan": "3.1.8"
      },
      {
        "versionType": "semver",
        "status": "unaffected",
        "version": "3.1.8"
      },
      {
        "versionType": "semver",
        "status": "affected",
        "version": "4.0.0",
        "lessThan": "4.1.5"
      },
      {
        "versionType": "semver",
        "status": "unaffected",
        "version": "4.1.5"
      }
    ],
    "packageURL": "pkg:npm/fast-uri"
  }
]

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15 Sep 2026 10:29Current
CVSS 3.14.8
4