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CVE-2026-35042 fast-jwt accepts unknown `crit` header extensions (RFC 7515 §4.1.11 MUST violation)

🗓️ 06 Apr 2026 17:02:12Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 32 Views

CVE-2026-35042: fast-jwt accepts unknown critical header extensions in 6.1.0 and earlier, violating MUST.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-35042
2 Apr 202608:54
–circl
cnnvd
CNNVD
Fast-JWT security vulnerability
6 Apr 202600:00
–cnnvd
cve
CVE
CVE-2026-35042
6 Apr 202617:02
–cve
github
Github Security Blog
fast-jwt accepts unknown `crit` header extensions (RFC 7515 violation)
3 Apr 202622:01
–github
mend
Mend
CVE-2026-35042
6 Apr 202617:02
–mend
nvd
NVD
CVE-2026-35042
6 Apr 202617:17
–nvd
osv_ghsa
osv_ghsa
GHSA-HM7R-C7QW-GHP6 fast-jwt accepts unknown `crit` header extensions (RFC 7515 violation)
3 Apr 202622:01
–osv_ghsa
ptsecurity
Positive Technologies
PT-2026-30280
3 Apr 202600:00
–ptsecurity
rapid7
Rapid7 Vulnerability Database (full)
CVE-2026-35042: Insufficient Verification of Data Authenticity
6 Apr 202600:00
–rapid7
redhatcve
RedhatCVE
CVE-2026-35042
7 Apr 202617:03
–redhatcve
Rows per page
[
  {
    "vendor": "nearform",
    "product": "fast-jwt",
    "versions": [
      {
        "version": "<= 6.1.0",
        "status": "affected"
      }
    ]
  }
]

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