CVE-2025-61152

01/תיאור (מקור, אנגלית)

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.

02/קישורים3

• github.com/javiermorales36/PoC-for-python-jose-alg-none-JWT-by‮…
• github.com/mpdavis/python-jose/issues/391
• pypi.org/project/python-jose