CVE-2023-23928EPSS p36.3%
CVE-2023-23928CVE-2023-23928
reason-jose_project / reason-jose
Description
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.
Scoring
| CVSS | 5.9 () |
| Vector | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N |
| EPSS | 0.46% probability of exploitation · percentile 36.3% · 2026-06-19T12:03:05Z |
| Last modified | 2026-06-17 |