CVE-2026-74240 — MEDIUM (5.4)

Vulnerability 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.

CVSS Score

5.4

MEDIUM

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 Products

Vendor	Product	Versions
Redhat	Openshift Update Service	-
Redhat	Quay	3.0.0

Related Weaknesses (CWE)

CWE-287

References

https://access.redhat.com/security/cve/CVE-2026-74240Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2516139Issue TrackingVendor Advisory

FAQ

What is CVE-2026-74240?

CVE-2026-74240 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 enforc...

How severe is CVE-2026-74240?

CVE-2026-74240 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-74240?

Check the references section above for vendor advisories and patch information. Affected products include: Redhat Openshift Update Service, Redhat Quay.