CVE-2026-102265

Published: Set 28, 2026 Last Modified: Set 28, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 5,3
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: low

Description

AI Translation Available

PyJWT is a Python implementation of JSON Web Token standards. From 2.13.0 until 2.14.0, PyJWS._load in jwt/api_jws.py is affected because parser catches ValueError but not RecursionError. This occurs when a deeply nested token header reaches json.loads. As a result, RecursionError escapes the documented PyJWT error hierarchy. Consequently, an unauthenticated malformed token can cause a request-level failure and HTTP 500. This issue is fixed in version 2.14.0.

674

Uncontrolled Recursion

Draft
Abstraction: Class Structure: Simple
Common Consequences
Security Scopes Affected:
Availability Confidentiality
Potential Impacts:
Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Read Application Data
Applicable Platforms
All platforms may be affected
View CWE Details
https://github.com/jpadilla/pyjwt/commit/06573692ebcdec8831…
https://github.com/jpadilla/pyjwt/commit/06573692ebcdec8831c3927513b3e87c31fbbb…
https://github.com/jpadilla/pyjwt/releases/tag/2.14.0
https://github.com/jpadilla/pyjwt/releases/tag/2.14.0
https://github.com/jpadilla/pyjwt/security/advisories/GHSA-…
https://github.com/jpadilla/pyjwt/security/advisories/GHSA-8wjv-2p76-3863