# CVE-2026-74240: Quay: jwt claim validation bypasses in quay federated robot and sso authentication

> CVE-2026-74240: Quay: jwt claim validation bypasses in quay federated robot and sso authentication. CVSS 5.4 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-74240
Last updated: 2026-08-20T19:45:42Z

- Published: 2026-08-14 22:43 UTC · Updated: 2026-08-20 19:45 UTC · Assigner: redhat
- CVSS: 5.4 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- EPSS: 0.29%, 22th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-287

## 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.

## Affected vendors and products

- Red Hat: Red Hat OpenShift Update Service
- Red Hat: Red Hat Quay 3

## Tracked companies

- [Red Hat (incl. Quay.io)](https://rewindex.com/company/red-hat.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-74240)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-74240)
- [https://access.redhat.com/security/cve/CVE-2026-74240](https://access.redhat.com/security/cve/CVE-2026-74240)
- [https://bugzilla.redhat.com/show\_bug.cgi?id=2516139](https://bugzilla.redhat.com/show_bug.cgi?id=2516139)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-74240 · Markdown: https://rewindex.com/cve/CVE-2026-74240.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-74240 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:11:04.568Z