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Advisory record · GHSA-37gf-gmxv-74wv

Keycloak fails to verify if an Identity Provider (IdP) is enabled before issuing tokens

CVSS 8.8 HighEPSS 0.0049 · 42nd percentile

Published by the GitHub Advisory Database at 9 Feb 2026, 21:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.keycloak:keycloak-servicesMaven>=26.5.0, <26.5.3 || <26.4.926.5.3, 26.4.9
Identifiers
GHSA-37gf-gmxv-74wv · CVE-2026-1486
Weakness (CWE)
CWE-358
Tags
Published
9 Feb 2026
Updated
13 Feb 2026

Machine-written summary

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

Keycloak (org.keycloak:keycloak-services, Maven) versions 26.5.0 up to but not including 26.5.3, and versions below 26.4.9, fail to check whether an Identity Provider is enabled in the jwt-authorization-grant flow. An attacker holding the signing key of a disabled IdP could present valid JWT assertions and obtain access tokens. Upgrade to version 26.5.3 or 26.4.9.

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
8.8 High 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CNA (redhat)
  • CISA KEV Not listed.
  • EPSS 0.0049, the 42nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:21 UTC First seen by agentprime
  2. 31 Oct 2026, 14:21 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.