CVEvulnerability

CVE-2026-32597

7.5 HIGH Published 2026-03-13 Modified 2026-09-10 Official page ↗
Status
Modified
Published
2026-03-13
Last modified
2026-09-10
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 3.1 (0b0ca135-0b70-47e7-9f44-1890c2a1c46c)
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weaknesses
CWE-345, CWE-347, CWE-863

Description

PyJWT is a JSON Web Token implementation in Python. Prior to 2.12.0, PyJWT does not validate the crit (Critical) Header Parameter defined in RFC 7515 §4.1.11. When a JWS token contains a crit array listing extensions that PyJWT does not understand, the library accepts the token instead of rejecting it. This violates the MUST requirement in the RFC. This vulnerability is fixed in 2.12.0.

Affected configurations

• pyjwt project pyjwt (< 2.12.0)

Related

Weakness · CWE (3)

  • CWE-345 Insufficient Verification of Data Authenticity weakness
  • CWE-347 Improper Verification of Cryptographic Signature weakness
  • CWE-863 Incorrect Authorization weakness

References