CVE-2026-101917

PyJWT is a Python implementation of JSON Web Token standards. Prior to 2.14.0, PyJWT get_signing_key_from_jwt is affected because unknown kid misses force refreshes without a negative cache or minimum refresh interval. This occurs when unauthenticated tokens repeatedly use the same unknown kid or varying kid values absent from the cached JWKS. As a result, each cache miss causes PyJWKClient to refresh the JWKS. Consequently, attacker traffic can amplify outbound requests to the configured JWKS endpoint. This issue is fixed in version 2.14.0.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/jpadilla/pyjwt/commit/ba4853a75fb9676362da17f67d0f64bd18afd4e1	Patch
https://github.com/jpadilla/pyjwt/releases/tag/2.14.0	Product Release Notes
https://github.com/jpadilla/pyjwt/security/advisories/GHSA-2gx3-rcp4-g85q	Exploit Vendor Advisory
https://github.com/jpadilla/pyjwt/security/advisories/GHSA-2gx3-rcp4-g85q	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

07 Oct 2026, 21:01

Type	Values Removed	Values Added
CPE		cpe:2.3:a:pyjwt_project:pyjwt::::::::
First Time		Pyjwt Project pyjwt Pyjwt Project
References	~~() https://github.com/jpadilla/pyjwt/commit/ba4853a75fb9676362da17f67d0f64bd18afd4e1 -~~	() https://github.com/jpadilla/pyjwt/commit/ba4853a75fb9676362da17f67d0f64bd18afd4e1 - Patch
References	~~() https://github.com/jpadilla/pyjwt/releases/tag/2.14.0 -~~	() https://github.com/jpadilla/pyjwt/releases/tag/2.14.0 - Product, Release Notes
References	~~() https://github.com/jpadilla/pyjwt/security/advisories/GHSA-2gx3-rcp4-g85q -~~	() https://github.com/jpadilla/pyjwt/security/advisories/GHSA-2gx3-rcp4-g85q - Exploit, Vendor Advisory

28 Sep 2026, 21:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-28 21:17

Updated : 2026-10-07 21:01

NVD link : CVE-2026-101917

Mitre link : CVE-2026-101917

CVE.ORG link : CVE-2026-101917

JSON object : View

Products Affected

pyjwt_project

pyjwt

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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