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Advisory record · GHSA-f5p5-6xmx-p252

Keycloak vulnerable to authorization bypass via incorrect uri comparison

CVSS 8.1 HighEPSS 0.0065 · 51st percentile

Published by the GitHub Advisory Database at 29 Oct 2026, 16:37 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.keycloak:keycloak-servicesMaven<26.6.426.6.4
org.keycloak:keycloak-policy-enforcerMaven<26.0.1026.0.10
Identifiers
GHSA-f5p5-6xmx-p252 · BIT-keycloak-2026-9800 · CVE-2026-9800
Weakness (CWE)
CWE-1025
Tags
Published
29 Oct 2026
Updated
29 Oct 2026

Machine-written summary

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

Keycloak versions before 26.6.4 (keycloak-services) and before 26.0.10 (keycloak-policy-enforcer) are affected. An authenticated user can bypass authorization policies, including role, scope, and UMA permission checks, by including the configured access-denied page path in a request URL, gaining unauthorized access to protected resources. Upgrade keycloak-services to 26.6.4 or keycloak-policy-enforcer to 26.0.10.

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
8.1 High 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N CNA (redhat)
  • CISA KEV Not listed.
  • EPSS 0.0065, the 51st percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:16 UTC First seen by agentprime
  2. 31 Oct 2026, 14:16 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.