CVE-2026-89317

JwtVerifierImpl.Verify does not enforce the JWS `crit` header (RFC 7515 §4.1.11)

State: Published
Severity: 6.3 Medium
Published: Oct 23, 2026
Updated: Oct 23, 2026
Reserved: Sep 11, 2026

Description

gose parsed the JWS `crit` header into `JwsHeader.Crit` and then never read it. RFC 7515 §4.1.11 requires a recipient to reject a JWS whose listed critical extension parameters it does not understand. gose implements no header extensions, so every token carrying a non-empty `crit` should have been rejected — and none were.

Scores

CVSS	Score	Vector	Source
4.0	6.3 Medium	CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N	eclipse

Weaknesses

CWE-20 Improper Input Validation
CWE-347 Improper Verification of Cryptographic Signature
CWE-1288 Improper Validation of Consistency within Input

Affected Products

Product	Versions
Eclipse KeyPont - GOSEEclipse Foundation	0.7.3 through 0.13.0-rc1Affected
Eclipse KeyPont - GOSEEclipse Foundation	before 1.0.0-rc4Affected

References

https://github.com/eclipse-keypont/gose/security/advisories/GHSA-445r-fpvv-hgwc

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