CVE-2026-75509

medium Red Hat
CVSS v3 Base Score
6.5
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
EPSS Score
0.1%
Exploitation probability in 30 days
Top 99% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Confidentiality
Low
Integrity
High
Availability
None
Published: August 24, 2026 (12 days ago)
Last Modified: August 24, 2026
Vendor: Red Hat
Source: REDHAT

Description

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.

CWE

CWE-480

Affected Products

Lightspeed CoreMigration Toolkit for Applications 8OpenShift LightspeedRed Hat Ansible Automation Platform 2Red Hat Enterprise Linux command line assistantRed Hat Hardened ImagesRed Hat OpenShift Virtualization 4Red Hat Satellite 6

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov 🔗 github.com 🔗 github.com