CVEvulnerability

CVE-2026-102267

9.1 CRITICAL Published 2026-09-28 Modified 2026-10-07 Official page ↗
Status
Analyzed
Published
2026-09-28
Last modified
2026-10-07
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.4 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS 3.1 ([email protected])
9.1 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weaknesses
CWE-200, CWE-345, CWE-918

Description

PyJWT is a Python implementation of JSON Web Token standards. Prior to 2.14.0, PyJWT PyJWKClient is affected because redirect destinations are not revalidated against the JWKS trust boundary. This occurs when a configured trusted JWKS endpoint returns an attacker-influenced redirect. As a result, PyJWKClient follows the redirect and consumes the redirected response as key material. Consequently, forwarded credentials may be disclosed or verification keys may be substituted. This issue is fixed in version 2.14.0.

Affected configurations

• pyjwt project pyjwt (< 2.14.0)

Related

Weakness · CWE (3)

  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor weakness
  • CWE-345 Insufficient Verification of Data Authenticity weakness
  • CWE-918 Server-Side Request Forgery weakness

References