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Advisory record · GHSA-4f53-xh3v-g8x4

Keycloak secondary factor bypass in step-up authentication

CVSS 5.0 MediumEPSS 0.0060 · 49th percentile

Published by the GitHub Advisory Database at 17 Apr 2024, 17:31 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-4f53-xh3v-g8x4 · CVE-2023-3597
Weakness (CWE)
CWE-287 · CWE-288
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 keycloak-services package (Maven org.keycloak:keycloak-services) is affected in versions below 22.0.10, and from 23.0.0 up to but not including 24.0.3. An attacker who already has a valid password for an account can register a false second authentication factor on that account, which then satisfies step-up authentication. Upgrade to 22.0.10 or 24.0.3, depending on the release line in use.

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
5.0 Medium 3.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L CNA (redhat)
  • CISA KEV Not listed.
  • EPSS 0.0060, the 49th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 17 Apr 2024, 13:17 UTC Published by the maintainers as a GitHub repository advisory
  2. 31 Oct 2026, 14:17 UTC First seen by agentprime
  3. 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.