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CVE-2026-54431

🗓️ 02 Jul 2026 10:30:57Reported by CERT-PLType 
cve
 cve
🔗 web.nvd.nist.gov👁 7 Views

Fixed improper data validation in liboauth2 DPoP proof parsing that exposed private key in json web key header.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-54431
2 Jul 202610:30
attackerkb
Cvelist
CVE-2026-54431 Improper Data Validation in liboauth2
2 Jul 202610:30
cvelist
EUVD
EUVD-2026-41277
2 Jul 202612:30
euvd
NVD
CVE-2026-54431
2 Jul 202611:16
nvd
Positive Technologies
PT-2026-54958
2 Jul 202600:00
ptsecurity
Vulnrichment
CVE-2026-54431 Improper Data Validation in liboauth2
2 Jul 202610:30
vulnrichment
Vulners
Node
openidcliboauth2Range<2.3.0
[
  {
    "vendor": "OpenIDC",
    "product": "liboauth2",
    "repo": "https://github.com/OpenIDC/liboauth2",
    "programFiles": [
      "src/dpop.c"
    ],
    "programRoutines": [
      {
        "name": "_oauth2_dpop_parse_and_validate()"
      }
    ],
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "2.3.0",
        "versionType": "semver"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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02 Jul 2026 13:16Current
5.8Medium risk
Vulners AI Score5.8
CVSS 45.1
SSVC
7