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Vulnerability record · CVE-2026-74240 · published 14 August 2026

CVE-2026-74240: Redhat openshift update service improper authentication vulnerability

Redhat · Openshift Update Service

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.

5.4 CVSS 3.1 Medium EPSS 0.29% · top 80.5% CWE-287 · Improper authentication
5.4CVSS 3.1 base score
0.29%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
2References
20 Aug 2026Last modified by NVD

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:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-74240), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.