Auth bypass in Red Hat Build Of Keycloak
CVE-2026-2733
A flaw was identified in the Docker v2 authentication endpoint of Keycloak, where tokens continue to be issued even after a Docker registry client has been administratively disabled. This means that turning the client “Enabled” setting to OFF does not fully prevent access. As a result, previously valid credentials can still be used to obtain authentication tokens. This weakens administrative controls and could allow unintended access to container registry resources.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.8 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (34.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 34.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
Weakness classification (CWE)
References
- access.redhat.com/errata/RHSA-2026:3947 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:3948 (vendor-advisory)
- access.redhat.com/security/cve/CVE-2026-2733 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
Frequently asked questions
- What is CVE-2026-2733?
- CVE-2026-2733 is a low-severity vulnerability in Red Hat Build Of Keycloak, classified under Improper Authorization. CVSS score: 3.8/10. Published 2026-02-19.
- How severe is CVE-2026-2733?
- Low severity. CVSS v3 base score is 3.8 out of 10.