Skip to content
VulniPulse
Sign in
Advisory severityMedium6.0Red Hat Linux

Medium [CVE-2025-12390] Org.keycloak.protocol.oidc.endpoints.logoutendpoint: offline session takeover due to reused authentication session id

This medium-severity Red Hat Linux advisory covers CVE-2025-12390 affecting Red Hat build of Keycloak 26.2.11, Red Hat build of Keycloak 26.4.4.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2025-12390 Source published Source updated

VulniPulse record published

CVE-2025-12390
Affected products & platforms
Red Hat LinuxUnclassified
Open source advisory

Summary

A flaw was found in Keycloak. In Keycloak where a user can accidentally get access to another user's session if both use the same device and browser.

This happens because Keycloak sometimes reuses session identifiers and doesn’t clean up properly during logout when browser cookies are missing. As a result, one user may receive tokens that belong to another user.

Red Hat severity: Moderate — CVSS 6 (CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N). Weakness: CWE-384.

Affected Red Hat products: Red Hat build of Keycloak 26.2; Red Hat build of Keycloak 26.2.11; Red Hat build of Keycloak 26.4; Red Hat build of Keycloak 26.4.4. Red Hat fixing advisory: RHSA-2025:22088, RHSA-2025:22089, RHSA-2025:21371, RHSA-2025:21370.

Is CVE-2025-12390 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2025-12390 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2025-12390?

Upgrade to a fixed release named by Red Hat:

  • rhbk/keycloak-operator-bundle:26.2.11-1
  • rhbk/keycloak-rhel9:26.2-12
  • rhbk/keycloak-rhel9-operator:26.2-12
  • rhbk/keycloak-operator-bundle:26.4.4-1
  • rhbk/keycloak-rhel9:26.4-3
  • rhbk/keycloak-rhel9-operator:26.4-3
  • keycloak
  • RHSA-2025:22088
  • RHSA-2025:22089
  • RHSA-2025:21371
  • RHSA-2025:21370

Confirm against the vendor advisory before you patch.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.

Official advisory · high-confidence parse· fetched 13 days ago·verify at source

Fixed versions
  • rhbk/keycloak-operator-bundle:26.2.11-1
  • rhbk/keycloak-rhel9:26.2-12
  • rhbk/keycloak-rhel9-operator:26.2-12
  • rhbk/keycloak-operator-bundle:26.4.4-1
  • rhbk/keycloak-rhel9:26.4-3
  • rhbk/keycloak-rhel9-operator:26.4-3
  • keycloak
  • RHSA-2025:22088
  • RHSA-2025:22089
  • RHSA-2025:21371
  • RHSA-2025:21370

Official advisory · high-confidence parse· fetched 13 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Official advisory · high-confidence parse· fetched 13 days ago·verify at source

Get an email when Red Hat publishes the next one.

See Red Hat's last 90 days of advisories first. Then choose one product with live alerts free for life, or a free month of real-time alerts on everything with the severity, the fixed version and the vendor's link (card needed, then US$15/month; we email you before the first charge).

Alert me about Red Hat

More Red Hat Linux advisories

All Red Hat Linux advisories

iPhone and Android apps · New on the App Store

Monitor future Red Hat Linux CVEs from your phone.

Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.

Download on the App StoreGet CVE alerts on AndroidSee app features

Discussion(0)

No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.

Sign in to join the discussion.