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Advisory record · GHSA-7fpj-9hr8-28vh

Keycloak vulnerable to impersonation via logout token exchange

CVSS 3.4 LowEPSS 0.0030 · 22nd percentile

Published by the GitHub Advisory Database at 17 Apr 2024, 18:25 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.keycloak:keycloak-servicesMaven<22.0.10 || >=23.0.0, <24.0.322.0.10, 24.0.3
Identifiers
GHSA-7fpj-9hr8-28vh · CVE-2023-0657
Weakness (CWE)
CWE-273 · CWE-284 · CWE-287 · CWE-290 · CWE-347
Tags
Published
17 Apr 2024
Updated
10 Sept 2026

Machine-written summary

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

Keycloak's org.keycloak:keycloak-services package is affected in versions below 22.0.10 and from 23.0.0 up to 24.0.3. An authenticated attacker could exchange a logout token for an access token, which may give them access to data beyond their permissions. Upgrade to version 22.0.10 or 24.0.3.

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
3.4 Low 3.1 CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N CNA (redhat)
  • CISA KEV Not listed.
  • EPSS 0.0030, the 22nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:17 UTC First seen by agentprime
  2. 31 Oct 2026, 14:17 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.