CVE-2025-61152
CVE-2025-61152
This page contains facts from public vulnerability sources. Check the original advisory before updating.
python-jose thru 3.3.0 allows JWT tokens with 'alg=none' to be decoded and accepted without any cryptographic signature verification. A malicious actor can craft a forged token with arbitrary claims (e.g., is_admin=true) and bypass authentication checks, leading to privilege escalation or unauthorized access in applications that rely on python-jose for token validation. This issue is exploitable unless developers explicitly reject 'alg=none' tokens, which is not enforced by the library. NOTE: all parties agree that the issue is not relevant because it only occurs in a "verify_signature": False situation.
CVSS 6.5 · Medium · EPSS 0.3%
- Published
- Updated
Stack: system
Affected products and versions
n/a
- Versions
- n/a: Affected
No fix published
python-jose Ubuntu:22.04:LTS
- Versions
- 3.3.0+dfsg-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
python-jose Ubuntu:24.04:LTS
- Versions
- 3.3.0+dfsg-4
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published