Auth bypass in Red Hat Openshift Update Service
CVE-2026-74240
A flaw was found in Red Hat Quay's JWT (JSON Web Token) validation for federated robot accounts and single sign-on (SSO) authentication. Multiple issues related to audience verification and the enforcement of `azp` and `sub` claims were identified. These flaws could allow an attacker with a validly-signed token from the same identity provider to bypass configured security restrictions. This bypass could lead to unauthorized access by circumventing intended audience, subject, or authorized-client limitations.
Vulnerability class: Broken Authentication
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
Affected products
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking)
Frequently asked questions
- What is CVE-2026-74240?
- CVE-2026-74240 is a medium-severity vulnerability in Red Hat Openshift Update Service, classified under Improper Authentication. CVSS score: 5.4/10. Published 2026-08-14.
- How severe is CVE-2026-74240?
- Medium severity. CVSS v3 base score is 5.4 out of 10.