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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2026-79651

Keycloak-services: keycloak-services: unauthenticated dos via unbounded locale caching

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Status
Published
Published
Updated
Assigning organization
redhat

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

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Red Hat Red Hat build of Keycloak 26.4

Default version status: affected

  • 26.4.16-2 to < *unaffected

Red Hat Red Hat build of Keycloak 26.4

Default version status: affected

  • 26.4-26 to < *unaffected

Red Hat Red Hat build of Keycloak 26.4

Default version status: affected

  • 26.4-26 to < *unaffected

Red Hat Red Hat build of Keycloak 26.4.16

Default version status: unaffected

Red Hat Red Hat build of Keycloak 26.4.16

Default version status: unaffected

Red Hat Red Hat build of Keycloak 26.4.16

Default version status: unaffected

Red Hat Red Hat build of Keycloak 26.6

Default version status: affected

  • 26.6.7-3 to < *unaffected

Red Hat Red Hat build of Keycloak 26.6

Default version status: affected

  • 26.6-20 to < *unaffected

Red Hat Red Hat build of Keycloak 26.6

Default version status: affected

  • 26.6-20 to < *unaffected

Red Hat Red Hat build of Keycloak 26.6.7

Default version status: unaffected

Red Hat Red Hat build of Keycloak 26.6.7

Default version status: unaffected

Red Hat Red Hat build of Keycloak 26.6.7

Default version status: unaffected

Red Hat Red Hat Single Sign-On 7

Default version status: unaffected

References