What is CVE-2026-18255?

CVE-2026-18255 is a high-severity vulnerability in Red Hat Quay 3, classified under Incorrect Authorization. CVSS score: 7.2/10. Published 2026-07-29.

How severe is CVE-2026-18255?

High severity. CVSS v3 base score is 7.2 out of 10.

Auth bypass in Red Hat Quay 3

CVE-2026-18255

A flaw was found in Quay. A user configured in GLOBAL_READONLY_SUPER_USERS is able to view robot account tokens for repositories they are not a member of, allowing an attacker with read-only superuser privileges to impersonate any robot ac…

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Red Hat Quay 3

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking)

Frequently asked questions

What is CVE-2026-18255?: CVE-2026-18255 is a high-severity vulnerability in Red Hat Quay 3, classified under Incorrect Authorization. CVSS score: 7.2/10. Published 2026-07-29.
How severe is CVE-2026-18255?: High severity. CVSS v3 base score is 7.2 out of 10.