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Advisory record · GHSA-46c8-635v-68r2

Keycloak Authorization Bypass vulnerability

CVSS 5.4 MediumEPSS 0.011 · 65th percentile

Published by the GitHub Advisory Database at 17 Apr 2024, 17:33 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.keycloak:keycloak-servicesMaven<22.0.10 || >=23.0.0, <24.0.322.0.10, 24.0.3
Identifiers
GHSA-46c8-635v-68r2 · CVE-2023-6544
Weakness (CWE)
CWE-625
Tags
Published
17 Apr 2024
Updated
10 Sept 2026

Machine-written summary

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

Keycloak (org.keycloak:keycloak-services) versions before 22.0.10 and from 23.0.0 before 24.0.3 are affected. A permissive regular expression used to filter allowed hosts for dynamic client registration lets a malicious user with enough knowledge of the environment bypass the restriction when the TrustedDomain configuration is used. Upgrade to 22.0.10 or 24.0.3. The source gives few details on the exact attack conditions.

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
5.4 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N CNA (redhat)
  • CISA KEV Not listed.
  • EPSS 0.011, the 65th percentile, on 5 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.