CVE-2026-74240
Quay: jwt claim validation bypasses in quay federated robot and sso authentication
CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-287 |
| Vendor | red hat |
| Product | red hat openshift update service |
| Published | Aug 14, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
Red Hat / Red Hat OpenShift Update Service
All versions affected Red Hat / Red Hat Quay 3
All versions affected Red Hat / Red Hat Quay 3
All versions affected References
Credits
Red Hat would like to thank meifukun (https://github.com/meifukun) for reporting this issue.