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Advisory record · GHSA-fjf4-6f34-w64q

Keycloak: Missing Check on Disabled Client for Docker Registry Protocol

CVSS 3.8 LowEPSS 0.0037 · 31st percentile

Published by the GitHub Advisory Database at 19 Feb 2026, 18:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.keycloak:keycloak-servicesMaven<=26.5.3No fixed version yet
Identifiers
GHSA-fjf4-6f34-w64q · CVE-2026-2733
Weakness (CWE)
CWE-285
Tags
Published
19 Feb 2026
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Keycloak's org.keycloak:keycloak-services package, versions up to and including 26.5.3, is affected. Because the Docker v2 authentication endpoint keeps issuing tokens for a Docker registry client after it has been disabled, an attacker holding previously valid credentials can still obtain tokens and reach container registry resources. The source gives few details on exact preconditions. No fixed version is listed.

Written 2 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
3.8 Low 3.1 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N CNA (redhat)
  • CISA KEV Not listed.
  • EPSS 0.0037, the 31st percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:17 UTC First seen by agentprime
  2. 31 Oct 2026, 14:17 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.