VULNERABILITY INTELLIGENCE

CVE-2026-48526

CVSS score7.4 HIGH
EPSS probability0.43%
CISA KEVNot currently listed
Published2026-05-28
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Description

PyJWT is a JSON Web Token implementation in Python. Prior to 2.13.0, when the verifier is decoding JSON Web Tokens, while supporting both asymmetric and HMAC algorithms, the library does not validate use of JSON Web Keys in HMAC algorithm, allowing attacker to use the issuer public key as the secret key for HMAC algorithm. This vulnerability is fixed in 2.13.0.

Weakness classification

  • security-advisories@github.com: CWE-287
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-347

Primary references