CVE-2023-23928 json
reason-jose ignores signature checks
published 2023-02-01 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-28003
- cvss
- 5.9
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 40%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- reason-jose_project reason-jose 0.8.2
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 19 mo ago
Exploit prediction
0.46% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- ulrikstrid reason-jose
Classification
- Weakness
-
- CWE-347 Improper Verification of Cryptographic Signature
References
-
github.com
/ulrikstrid/reason-jose/commit/36cd724db3cbec121757624da49072386bd869e5
patch, third-party-advisory
-
github.com
/ulrikstrid/reason-jose/security/advisories/GHSA-7jj9-6qwv-wpm7
third-party-advisory
-
github.com
/ulrikstrid/reason-jose/releases/tag/v0.8.2
release-notes, third-party-advisory
Sources
- CVE List CVE-2023-23928
- NVD CVE-2023-23928
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