Bug 2447194 (CVE-2026-32597) - CVE-2026-32597 pyjwt: PyJWT accepts unknown `crit` header extensions (RFC 7515 §4.1.11 MUST violation)
Summary: CVE-2026-32597 pyjwt: PyJWT accepts unknown `crit` header extensions (RFC 751...
Keywords:
Status: NEW
Alias: CVE-2026-32597
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-12 22:01 UTC by OSIDB Bzimport
Modified: 2026-05-13 15:22 UTC (History)
71 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:12176 0 None None None 2026-04-30 10:05:46 UTC
Red Hat Product Errata RHSA-2026:13508 0 None None None 2026-05-04 13:58:53 UTC
Red Hat Product Errata RHSA-2026:13512 0 None None None 2026-05-04 14:16:11 UTC
Red Hat Product Errata RHSA-2026:13672 0 None None None 2026-05-05 10:23:40 UTC
Red Hat Product Errata RHSA-2026:13916 0 None None None 2026-05-06 06:33:31 UTC
Red Hat Product Errata RHSA-2026:17083 0 None None None 2026-05-13 15:22:24 UTC

Description OSIDB Bzimport 2026-03-12 22:01:52 UTC 
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.
Comment 4 errata-xmlrpc 2026-04-30 10:05:41 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:12176 https://access.redhat.com/errata/RHSA-2026:12176
Comment 5 errata-xmlrpc 2026-05-04 13:58:49 UTC 
This issue has been addressed in the following products:

  Red Hat Ansible Automation Platform 2.6 for RHEL 10
  Red Hat Ansible Automation Platform 2.6 for RHEL 9

Via RHSA-2026:13508 https://access.redhat.com/errata/RHSA-2026:13508
Comment 6 errata-xmlrpc 2026-05-04 14:16:07 UTC 
This issue has been addressed in the following products:

  Red Hat Ansible Automation Platform 2.5 for RHEL 9
  Red Hat Ansible Automation Platform 2.5 for RHEL 8

Via RHSA-2026:13512 https://access.redhat.com/errata/RHSA-2026:13512
Comment 7 errata-xmlrpc 2026-05-05 10:23:36 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:13672 https://access.redhat.com/errata/RHSA-2026:13672
Comment 8 errata-xmlrpc 2026-05-06 06:33:26 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:13916 https://access.redhat.com/errata/RHSA-2026:13916
Comment 10 errata-xmlrpc 2026-05-13 15:22:20 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:17083 https://access.redhat.com/errata/RHSA-2026:17083
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