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.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

To mitigate this issue, Red Hat Quay administrators should ensure that federated robot authentication is configured with specific audiences to enable 'verify_aud' enforcement. Additionally, review and update existing federation configurations to explicitly include and enforce 'azp' and 'sub' claims, preventing bypasses when these claims are absent. Refer to Red Hat Quay documentation for detailed configuration steps. A restart of affected Quay services may be required after configuration changes.

History

Fri, 21 Aug 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 20 Aug 2026 20:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:redhat:openshift_update_service:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:quay:3.0.0:*:*:*:*:*:*:*

Mon, 17 Aug 2026 10:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat quay 3
Vendors & Products Redhat quay 3

Sat, 15 Aug 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Fri, 14 Aug 2026 23:00:00 +0000

Type Values Removed Values Added
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.
Title Quay: jwt claim validation bypasses in quay federated robot and sso authentication
First Time appeared Redhat
Redhat openshift Update Service
Redhat quay
Weaknesses CWE-287
CPEs cpe:/a:redhat:openshift_update_service:5
cpe:/a:redhat:quay:3
Vendors & Products Redhat
Redhat openshift Update Service
Redhat quay
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-08-20T14:12:03.863Z

Reserved: 2026-08-14T19:46:37.190Z

Link: CVE-2026-74240

cve-icon Vulnrichment

Updated: 2026-08-20T14:11:59.199Z

cve-icon NVD

Status : Analyzed

Published: 2026-08-14T23:16:33.960

Modified: 2026-08-20T19:45:42.220

Link: CVE-2026-74240

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-08-14T00:00:00Z

Links: CVE-2026-74240 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-17T10:30:08Z

Weaknesses