CVSS 3.1
9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2023-23928
reason-jose is a JOSE implementation in ReasonML and OCaml.`Jose.Jws.validate` does not check HS256 signatures. This allows tampering of JWS header and payload data if the service does not perform additional checks. Such tampering could expose applications using reason-jose to authorization bypass. Applications relying on JWS claims assertion to enforce security boundaries may be vulnerable to privilege escalation. This issue has been patched in version 0.8.2.
Severity
- EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 39% of CVEs (scores of 2026-10-31)
- CWE
- CWE-347
- Published
- Modified
- Record from
- the NVD, synced
Affected
- reason-jose_project:reason-jose
References
- https://github.com/ulrikstrid/reason-jose/commit/36cd724db3cbec121757624da49072386bd869e5
- https://github.com/ulrikstrid/reason-jose/releases/tag/v0.8.2
- https://github.com/ulrikstrid/reason-jose/security/advisories/GHSA-7jj9-6qwv-wpm7
- https://github.com/ulrikstrid/reason-jose/commit/36cd724db3cbec121757624da49072386bd869e5
- https://github.com/ulrikstrid/reason-jose/releases/tag/v0.8.2