{"id":"CVE-2023-23928","summary":"reason-jose ignores signature checks","details":"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.","aliases":["GHSA-7jj9-6qwv-wpm7"],"modified":"2026-07-08T06:36:17.863080669Z","published":"2023-02-01T00:59:38.475Z","database_specific":{"cna_assigner":"GitHub_M","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/23xxx/CVE-2023-23928.json","cwe_ids":["CWE-347"]},"references":[{"type":"WEB","url":"https://github.com/ulrikstrid/reason-jose/releases/tag/v0.8.2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/23xxx/CVE-2023-23928.json"},{"type":"ADVISORY","url":"https://github.com/ulrikstrid/reason-jose/security/advisories/GHSA-7jj9-6qwv-wpm7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-23928"},{"type":"FIX","url":"https://github.com/ulrikstrid/reason-jose/commit/36cd724db3cbec121757624da49072386bd869e5"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ulrikstrid/ocaml-jose","events":[{"introduced":"0"},{"fixed":"2b4551287bf699af214cba265af762d711083fad"},{"fixed":"36cd724db3cbec121757624da49072386bd869e5"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"0.8.2"}],"source":["CPE_RANGE","REFERENCES"],"cpe":"cpe:2.3:a:reason-jose_project:reason-jose:*:*:*:*:*:*:*:*"}}],"versions":["v0.8.1","v0.8.0","v0.7.0","v0.5.1","v0.5.0","v0.4.0","v0.3.1","v0.2.0","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-23928.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N"}]}