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7.5 High

CVE-2026-79651 A flaw was found in the theme localization endpoints of the keycloak-services component, which is the core service…

Description

A flaw was found in the theme localization endpoints of the keycloak-services component, which is the core service responsible for authentication flows and theme management in Keycloak. The issue occurs because the system accepts arbitrary locale tags from unauthenticated requests and stores them in a permanent in-memory cache without limits. An attacker can exploit this by sending a large number of unique locale tags, eventually causing the server to run out of memory and crash.

Affected products and versions

Product Affected versions Fixed in
Red Hat Build of Keycloak Versions not published
Red Hat Single Sign-On 7 Versions not published
Red Hat build of Keycloak 26.4 26.4 earliest → < 26.4-26 26.4-26
Red Hat build of Keycloak 26.4.16 Versions not published
Red Hat build of Keycloak 26.6 26.6 earliest → < 26.6-20 26.6-20
Red Hat build of Keycloak 26.6.7 Versions not published

References

Timeline

  1. Published
  2. Last modified

Other CVEs of Red Hat Build of Keycloak

The 266 CVEs of Red Hat Build of Keycloak →
CVE-2026-97847 Keycloak-services: keycloak-services: client manager can substitute sessionless token principal via hardcoded-claim mappers to obtain realm administrator authority 7.1 High CVE-2026-97175 Keycloak-services: keycloak-services: unverified idp email auto-linking enables account takeover 8.8 High CVE-2026-97174 Keycloak-services: keycloak-services: ciba sub parameter injection causes attacker authentication to issue victim tokens 6.8 Medium CVE-2026-96453 Org.keycloak/keycloak-admin-cli: keycloak-admin-cli: kcadm custom truststore accepts arbitrary self-signed certificates 8.0 High
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