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Advisory record · GHSA-83c4-ffjp-mxp9

Keycloak: Revoked Tokens Can Remain Active When Both Realm-Level and Client-Level `notBefore` Revocation Policies are Configured

CVSS 5.4 MediumEPSS 0.0028 · 20th percentile

Published by the GitHub Advisory Database at 19 May 2026, 09:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.keycloak:keycloak-servicesMaven<=26.6.2No fixed version yet
Identifiers
GHSA-83c4-ffjp-mxp9 · CVE-2026-8922
Weakness (CWE)
CWE-303
Tags
Published
19 May 2026
Updated
26 Jun 2026

Machine-written summary

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

Keycloak's keycloak-services package, versions up to and including 26.6.2, is affected. When both realm-level and client-level notBefore revocation policies are configured, the OIDC Introspection feature fails to honor the realm-level policy, so tokens that should be revoked can remain active. The source does not describe the attacker's required access. No fixed version is listed, and the source gives no workaround.

Written 3 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 0.0028, the 20th 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.