CVE-2026-74240: A flaw was found in Red Hat Quay's JWT (JSON Web Token) validation for federated robot accounts and single sig

Routine

MEDIUM 5.4WATCHLISTMITIGATEDOWNGRADE

CVE-2026-74240 is a medium-severity flaw (CVSS 5.4) affecting openshift update service, quay. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 circumventin

Why this priority

On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 78%)
CISA exploited list	No
Weakness	CWE-287
Published	2026-08-14
Last modified	2026-08-20

Publisher (CNA): Red Hat, Inc. · Vendor: redhat

Last updated 2026-08-20 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-14 23:16 UTCPublished CVE record published
2026-08-20 19:45 UTCUpdated Record last modified

redhat openshift update service MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy openshift-update-service || rpm -q openshift-update-service || openshift-update-service --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

redhat quay DOWNGRADE

Affected: 3.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0.0

1. Check installed version

apt-cache policy quay || rpm -q quay || quay --version

2. No fixed release: DOWNGRADE to a release before 3.0.0 (Debian / Ubuntu)

apt-cache madison quay sudo apt install quay=<VERSION_BEFORE_3.0.0> sudo apt-mark hold quay

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list quay sudo dnf downgrade quay-<VERSION_BEFORE_3.0.0> sudo dnf versionlock add quay

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-74240?

openshift update service: mitigate or apply the listed mitigation; quay: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-74240 being exploited?

CVE-2026-74240 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-74240 affect?

CVE-2026-74240 affects openshift update service, quay. Severity is medium (CVSS 5.4). 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 ide

How urgent is CVE-2026-74240?

Priority 29/100. On your watchlist

Software pages

Red Hat OpenShift vulnerabilities

Related CVEs

CVE-2026-74245 MEDIUM 5.9 MITIGATE DOWNGRADE A flaw was found in Red Hat Quay's exported logs feature
CVE-2026-74244 MEDIUM 5.9 MITIGATE DOWNGRADE A flaw was found in Red Hat Quay's Stripe billing webhook handler
CVE-2026-74247 MEDIUM 4.2 MITIGATE DOWNGRADE A flaw was found in Red Hat Quay
CVE-2026-74243 MEDIUM 6.5 MITIGATE DOWNGRADE A flaw was found in Red Hat Quay
CVE-2026-74241 MEDIUM 4.8 MITIGATE DOWNGRADE A flaw was found in Red Hat Quay's external Lightweight Directory Access Protocol (LDAP) authentication handli

References

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