CVE-2026-32597

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.
References
Link Resource
https://github.com/jpadilla/pyjwt/security/advisories/GHSA-752w-5fwx-jx9f Exploit Mitigation Vendor Advisory
https://lists.debian.org/debian-lts-announce/2026/05/msg00008.html
https://access.redhat.com/errata/RHSA-2026:10140
https://access.redhat.com/errata/RHSA-2026:10141
https://access.redhat.com/errata/RHSA-2026:10184
https://access.redhat.com/errata/RHSA-2026:12176
https://access.redhat.com/errata/RHSA-2026:13508
https://access.redhat.com/errata/RHSA-2026:13512
https://access.redhat.com/errata/RHSA-2026:13545
https://access.redhat.com/errata/RHSA-2026:13553
https://access.redhat.com/errata/RHSA-2026:13672
https://access.redhat.com/errata/RHSA-2026:13916
https://access.redhat.com/errata/RHSA-2026:17083
https://access.redhat.com/errata/RHSA-2026:19138
https://access.redhat.com/errata/RHSA-2026:19355
https://access.redhat.com/errata/RHSA-2026:19375
https://access.redhat.com/errata/RHSA-2026:19712
https://access.redhat.com/errata/RHSA-2026:21431
https://access.redhat.com/errata/RHSA-2026:21517
https://access.redhat.com/errata/RHSA-2026:22330
https://access.redhat.com/errata/RHSA-2026:24977
https://access.redhat.com/errata/RHSA-2026:26226
https://access.redhat.com/errata/RHSA-2026:37275
https://access.redhat.com/errata/RHSA-2026:42644
https://access.redhat.com/errata/RHSA-2026:6568
https://access.redhat.com/errata/RHSA-2026:6720
https://access.redhat.com/errata/RHSA-2026:6912
https://access.redhat.com/errata/RHSA-2026:6926
https://access.redhat.com/errata/RHSA-2026:8437
https://access.redhat.com/errata/RHSA-2026:8746
https://access.redhat.com/errata/RHSA-2026:8747
https://access.redhat.com/errata/RHSA-2026:8748
https://access.redhat.com/security/cve/CVE-2026-32597
https://bugzilla.redhat.com/show_bug.cgi?id=2447194
https://github.com/jpadilla/pyjwt/security/advisories/GHSA-752w-5fwx-jx9f Exploit Mitigation Vendor Advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32597.json
Configurations

Configuration 1 (hide)

cpe:2.3:a:pyjwt_project:pyjwt:*:*:*:*:*:*:*:*

History

22 Jul 2026, 12:17

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:42644 -

10 Jul 2026, 12:16

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:37275 -

30 Jun 2026, 03:18

Type Values Removed Values Added
CWE CWE-347
References
  • () https://access.redhat.com/errata/RHSA-2026:10140 -
  • () https://access.redhat.com/errata/RHSA-2026:10141 -
  • () https://access.redhat.com/errata/RHSA-2026:10184 -
  • () https://access.redhat.com/errata/RHSA-2026:12176 -
  • () https://access.redhat.com/errata/RHSA-2026:13508 -
  • () https://access.redhat.com/errata/RHSA-2026:13512 -
  • () https://access.redhat.com/errata/RHSA-2026:13545 -
  • () https://access.redhat.com/errata/RHSA-2026:13553 -
  • () https://access.redhat.com/errata/RHSA-2026:13672 -
  • () https://access.redhat.com/errata/RHSA-2026:13916 -
  • () https://access.redhat.com/errata/RHSA-2026:17083 -
  • () https://access.redhat.com/errata/RHSA-2026:19138 -
  • () https://access.redhat.com/errata/RHSA-2026:19355 -
  • () https://access.redhat.com/errata/RHSA-2026:19375 -
  • () https://access.redhat.com/errata/RHSA-2026:19712 -
  • () https://access.redhat.com/errata/RHSA-2026:21431 -
  • () https://access.redhat.com/errata/RHSA-2026:21517 -
  • () https://access.redhat.com/errata/RHSA-2026:22330 -
  • () https://access.redhat.com/errata/RHSA-2026:24977 -
  • () https://access.redhat.com/errata/RHSA-2026:26226 -
  • () https://access.redhat.com/errata/RHSA-2026:6568 -
  • () https://access.redhat.com/errata/RHSA-2026:6720 -
  • () https://access.redhat.com/errata/RHSA-2026:6912 -
  • () https://access.redhat.com/errata/RHSA-2026:6926 -
  • () https://access.redhat.com/errata/RHSA-2026:8437 -
  • () https://access.redhat.com/errata/RHSA-2026:8746 -
  • () https://access.redhat.com/errata/RHSA-2026:8747 -
  • () https://access.redhat.com/errata/RHSA-2026:8748 -
  • () https://access.redhat.com/security/cve/CVE-2026-32597 -
  • () https://bugzilla.redhat.com/show_bug.cgi?id=2447194 -
  • () https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32597.json -

05 May 2026, 18:16

Type Values Removed Values Added
References
  • () https://lists.debian.org/debian-lts-announce/2026/05/msg00008.html -

19 Mar 2026, 13:30

Type Values Removed Values Added
References () https://github.com/jpadilla/pyjwt/security/advisories/GHSA-752w-5fwx-jx9f - () https://github.com/jpadilla/pyjwt/security/advisories/GHSA-752w-5fwx-jx9f - Exploit, Mitigation, Vendor Advisory
First Time Pyjwt Project pyjwt
Pyjwt Project
CPE cpe:2.3:a:pyjwt_project:pyjwt:*:*:*:*:*:*:*:*

16 Mar 2026, 14:53

Type Values Removed Values Added
Summary
  • (es) PyJWT es una implementación de JSON Web Token en Python. Antes de la 2.12.0, PyJWT no valida el parámetro de encabezado crit (Crítico) definido en la RFC 7515 §4.1.11. Cuando un token JWS contiene un array crit que lista extensiones que PyJWT no entiende, la biblioteca acepta el token en lugar de rechazarlo. Esto viola el requisito MUST en la RFC. Esta vulnerabilidad está corregida en la 2.12.0.

13 Mar 2026, 19:55

Type Values Removed Values Added
New CVE

Information

Published : 2026-03-13 19:55

Updated : 2026-07-22 12:17


NVD link : CVE-2026-32597

Mitre link : CVE-2026-32597

CVE.ORG link : CVE-2026-32597


JSON object : View

Products Affected

pyjwt_project

  • pyjwt
CWE
CWE-345

Insufficient Verification of Data Authenticity

CWE-863

Incorrect Authorization

CWE-347

Improper Verification of Cryptographic Signature