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Advisory record · GHSA-4q93-v92x-p89f

Keycloak Vulnerable to Incorrect Authorization

CVSS 4.3 MediumEPSS 0.0022 · 11th percentile

Published by the GitHub Advisory Database at 28 May 2026, 06:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.keycloak:keycloak-server-spi-privateMaven>=26.5.0, <26.6.3 || <=26.4.726.6.3
org.keycloak:keycloak-servicesMaven>=26.5.0, <26.6.3 || <=26.4.726.6.3
Identifiers
GHSA-4q93-v92x-p89f · CVE-2026-9791
Weakness (CWE)
CWE-863
Tags
Published
28 May 2026
Updated
1 Jul 2026

Machine-written summary

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

Keycloak (org.keycloak:keycloak-server-spi-private and org.keycloak:keycloak-services) versions >=26.5.0 before 26.6.3 and <=26.4.7 are affected. An authenticated user who is a member of an organization can use user-facing APIs, such as the account API, or request an OIDC token with the 'organization' scope to get organization metadata, even after an administrator has disabled the Organizations feature. This could lead resource servers to make incorrect authorization decisions. Upgrade to 26.6.3.

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
4.3 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N CNA (redhat)
  • CISA KEV Not listed.
  • EPSS 0.0022, the 11th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:20 UTC First seen by agentprime
  2. 31 Oct 2026, 14:20 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.