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PYSEC-2026-120

🗓️ 13 Mar 2026 19:55:09Reported by Python Packaging AdvisoryType 
pypa
 pypa🔗 github.com👁 14 Views

PyJWT prior to 2.12.0 does not validate the crit header, allowing unknown extensions; fixed in 2.12.0.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
IBM Security Bulletins		Security Bulletin: Multiple Vulnerabilities in IBM watsonx Code Assistant On Prem
9 Apr 202610:57
–ibm
IBM Security Bulletins		Security Bulletin: Multiple Vulnerabilities in IBM watsonx Code Assistant On Prem
23 Mar 202615:13
–ibm
IBM Security Bulletins		Security Bulletin: IBM Edge Data Collector uses PyJWT-2.10.1-py3-none-any.whl, pyjwt-2.11.0-py3-none-any.whl which is vulnerable to CVE-2026-32597.
4 May 202614:36
–ibm
IBM Security Bulletins		Security Bulletin: IBM Watson Discovery Cartridge affected by vulnerability in pyjwt-2.11.0-py3-none-any.whl
29 Apr 202617:40
–ibm
IBM Security Bulletins		Security Bulletin: PyJWT Fails to Validate Critical (crit) Header Parameter, Allowing Token Acceptance
4 May 202612:30
–ibm
IBM Security Bulletins		Security Bulletin: IBM Cloud Pak for Data System (CPDS 1.0) is affected by insufficient verification of data authenticity in PyJWT
16 Jun 202606:22
–ibm
ATTACKERKB		CVE-2026-32597
12 Mar 202621:41
–attackerkb
Tenable Nessus		Amazon Linux 2023 : python3-jwt, python3-jwt+crypto (ALAS2023-2026-1519)
2 Apr 202600:00
–nessus
Tenable Nessus		AlmaLinux 8 : fence-agents (ALSA-2026:12176)
30 Apr 202600:00
–nessus
Tenable Nessus		AlmaLinux 10 : fence-agents (ALSA-2026:13916)
6 May 202600:00
–nessus
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Vulners
Node
pypipyjwtRange0–2.12.0

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20 May 2026 09:19Current
6.8Medium risk
Vulners AI Score6.8
CVSS 3.17.5
EPSS0.00269
SSVC
PyJWTcritical header parameterjws tokenunknown extensionsversion two twelve zerovulnerability fixed
14