CVE-2025-54887 (GCVE-0-2025-54887)
Vulnerability from cvelistv5 – Published: 2025-08-08 00:06 – Updated: 2025-08-08 16:43
VLAI
EPSS
VEX
Title
jwe: Missing AES-GCM authentication tag validation in encrypted JWEs
Summary
jwe is a Ruby implementation of the RFC 7516 JSON Web Encryption (JWE) standard. In versions 1.1.0 and below, authentication tags of encrypted JWEs can be brute forced, which may result in loss of confidentiality for those JWEs and provide ways to craft arbitrary JWEs. This puts users at risk because JWEs can be modified to decrypt to an arbitrary value, decrypted by observing parsing differences and the GCM internal GHASH key can be recovered. Users are affected by this vulnerability even if they do not use an AES-GCM encryption algorithm for their JWEs. As the GHASH key may have been leaked, users must rotate the encryption keys after upgrading. This issue is fixed in version 1.1.1.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-08-08 16:42 UTC
CWE
- CWE-354 - Improper Validation of Integrity Check Value
Assigner
GitHub_M
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/jwt/ruby-jwe/security/advisori… | x_refsource_CONFIRM |
| https://github.com/jwt/ruby-jwe/commit/1e719d79ba… | x_refsource_MISC |
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