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

Collected exploitation and prediction evidence

Risk source coverage

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

Dated risk observations

Risk history is separate from CNA/OSV content history. Daily score drift is retained but only an upward crossing of 10% triggers the prediction change event.

Immutable source observations

3 recorded revisions

Each citation identifies one complete source statement. Source modification dates and the time this installation observed them are distinct. Latest history includes records historically associated by source identifiers; a removed alias is not a current equivalence claim. Exact citations show that source record's own earlier observations. Failed reads and unchanged polls do not rewrite history.

25 Oct 2026 08:17:35 UTC

fast-jwt provides fast JSON Web Token (JWT) implementation. In 6.1.0 and earlier, fast-jwt does not validate the crit (Critical) Header Parameter defined in RFC 7515 §4.1.11. When a JWS token contains a crit array listing extensions that fa…

nvd · CVE-2026-35042 · Published

24 Oct 2026 13:17:17 UTC

fast-jwt accepts unknown `crit` header extensions (RFC 7515 violation)

osv · GHSA-hm7r-c7qw-ghp6 · Published

23 Oct 2026 15:48:27 UTC

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

cve-program · CVE-2026-35042 · Published

ChangeIntel

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Sources read 26 Oct 05:31 UTC · 271 of 271 readable · 269 fully read · documentation 464/464 current