CVE-2026-123710 (CVSS 9.8)

Description

A flaw was found in Red Hat Quay. An unauthenticated client can obtain an anonymous registry token with an audience it controls, present that token to the service key rotation endpoint, and install its own approved signing key with no expiry. Registry tokens signed with that key are accepted for any repository, allowing read and write access to private images and replacement of repository tags.

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CVSS v3.1 Score

9.8

CRITICAL

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

EPSS — Exploit Prediction

0.0043

Probability of exploitation

0.37%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-1287 CWE-1287

References

Other References

https://access.redhat.com/errata/RHSA-2026:99019 https://access.redhat.com/errata/RHSA-2026:99021 https://access.redhat.com/errata/RHSA-2026:99022 https://access.redhat.com/errata/RHSA-2026:99023 https://access.redhat.com/errata/RHSA-2026:99024 https://access.redhat.com/errata/RHSA-2026:99025 https://access.redhat.com/errata/RHSA-2026:99026 https://access.redhat.com/errata/RHSA-2026:99027 https://access.redhat.com/security/cve/CVE-2026-123710 https://access.redhat.com/solutions/7149923

Frequently Asked Questions

What is CVE-2026-123710? +

A flaw was found in Red Hat Quay. An unauthenticated client can obtain an anonymous registry token with an audience it controls, present that token to the service key rotation endpoint, and install its own approved signing key with no expiry. Registry tokens signed with that key are accepted for any repository, allowing read and write access to private images and replacement of repository tags. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-123710? +

CVE-2026-123710 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0043, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-123710? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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