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Advisory record · GHSA-27gc-wj6x-9w55

Keycloak error_description injection on error pages that can trigger phishing attacks

CVSS 4.3 MediumEPSS 0.0032 · 25th percentile

Published by the GitHub Advisory Database at 17 Oct 2025, 17:39 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.keycloak:keycloak-account-uiMaven<26.2.9 || >=26.3.0, <26.3.426.2.9, 26.3.4
org.keycloak:keycloak-admin-uiMaven<26.2.9 || >=26.3.0, <26.3.426.2.9, 26.3.4
Identifiers
GHSA-27gc-wj6x-9w55 · CVE-2025-10044
Weakness (CWE)
CWE-79
Tags
Published
17 Oct 2025
Updated
17 Oct 2025

Machine-written summary

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

Keycloak's account console and admin console (org.keycloak:keycloak-account-ui and org.keycloak:keycloak-admin-ui) are affected in versions before 26.2.9 and from 26.3.0 before 26.3.4. The error_description query parameter is shown on error pages without validation, so an attacker can craft a link that displays misleading text, such as a fake support number or URL, inside the trusted Keycloak interface. Upgrade to 26.2.9 or 26.3.4. The source gives few details on any workaround.

Written 7 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
4.3 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N CNA (redhat)
  • CISA KEV Not listed.
  • EPSS 0.0032, the 25th percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 8 Oct 2025, 14:06 UTC Published by the maintainers as a GitHub repository advisory
  2. 31 Oct 2026, 15:10 UTC First seen by agentprime
  3. 31 Oct 2026, 15:10 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.