CVE-2026-32597

HIGH EPSS 9.8%
Published Mar 13, 20263mo ago · Modified May 5, 20261mo ago
7.5 CVSS 3.1
High
Find Similar
Published Mar 13, 2026 3mo ago
Last Modified May 5, 2026 1mo ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity High
Availability None

Threat Intelligence

EPSS Exploit Probability
9.8% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 2

CWE-345
CWE-863 Incorrect Authorization Authorization

Affected Products 1

VendorProductVersionRange
pyjwt_projectpyjwt* <2.12.0

References 2

  • github.com https://github.com/jpadilla/pyjwt/security/advisories/GHSA-752w-5fwx-jx9f
    ExploitMitigationVendor Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2026/05/msg00008.html

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.