CVE-2026-74240
Quay: jwt claim validation bypasses in quay federated robot and sso authentication
- State
- Published
- Severity
- 5.4 Medium
- Published
- Aug 14, 2026
- Updated
- Aug 20, 2026
- Reserved
- Aug 14, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.4 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N | redhat |
Weaknesses
- CWE-287 Improper Authentication
Affected Products
| Product | Versions |
|---|---|
Red Hat OpenShift Update ServiceRed Hat | |
Red Hat Quay 3Red Hat | |
Red Hat Quay 3Red Hat |
References
- https://access.redhat.com/security/cve/CVE-2026-74240vdb-entry
- RHBZ#2516139issue-tracking
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