CVE-2026-75509

Published: Ago 24, 2026 Last Modified: Ago 24, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 6,5
Source: [email protected]
Attack Vector: network
Attack Complexity: high
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: low
Integrity: high
Availability: none

Description

AI Translation Available

joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards. Prior to version 1.7.3, JWTClaimsRegistry applies membership matching to list-valued iss and sub claims, allowing an array-valued iss that contains the expected issuer to pass an intended equality check and enabling issuer-validation bypass. This issue is fixed in version 1.7.3.

290

Authentication Bypass by Spoofing

Incomplete
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Access Control
Potential Impacts:
Bypass Protection Mechanism Gain Privileges Or Assume Identity
Applicable Platforms
All platforms may be affected
View CWE Details
345

Insufficient Verification of Data Authenticity

Draft
Abstraction: Class Structure: Simple
Common Consequences
Security Scopes Affected:
Integrity Other
Potential Impacts:
Varies By Context Unexpected State
Applicable Platforms
Technologies: ICS/OT
View CWE Details
https://github.com/authlib/joserfc/commit/76ee6a59bf5773c0a…
https://github.com/authlib/joserfc/commit/76ee6a59bf5773c0af00b99076c5e199031f9…
https://github.com/authlib/joserfc/security/advisories/GHSA…
https://github.com/authlib/joserfc/security/advisories/GHSA-r74j-q665-7rpj