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Advisory record · GHSA-m297-3jv9-m927

Keycloak allows authentication using an Identity Provider (IdP) even after it has been disabled by an administrator

CVSS 8.1 HighEPSS 0.0038 · 32nd percentile

Published by the GitHub Advisory Database at 5 Mar 2026, 21:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.keycloak:keycloak-servicesMaven<26.5.526.5.5
Identifiers
GHSA-m297-3jv9-m927 · BIT-keycloak-2026-3009 · CVE-2026-3009
Weakness (CWE)
CWE-285 · CWE-863
Tags
Published
5 Mar 2026
Updated
26 Aug 2026

Machine-written summary

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

Keycloak (Maven package org.keycloak:keycloak-services) versions before 26.5.5 are vulnerable. An attacker who knows the identity provider alias and can reuse a previously generated login request can authenticate through an identity provider that an administrator has disabled. Upgrade to version 26.5.5, which contains the fix.

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 0.0038, the 32nd percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:19 UTC First seen by agentprime
  2. 31 Oct 2026, 14:19 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.