CVE-2026-79651

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:68276
https://access.redhat.com/errata/RHSA-2026:68277
https://access.redhat.com/errata/RHSA-2026:68278
https://access.redhat.com/errata/RHSA-2026:68280
https://access.redhat.com/security/cve/CVE-2026-79651
https://bugzilla.redhat.com/show_bug.cgi?id=2523345

Configurations

No configuration.

History

16 Sep 2026, 16:17

Type	Values Removed	Values Added
References		() https://access.redhat.com/errata/RHSA-2026:68276 - () https://access.redhat.com/errata/RHSA-2026:68277 - () https://access.redhat.com/errata/RHSA-2026:68278 - () https://access.redhat.com/errata/RHSA-2026:68280 -

16 Sep 2026, 15:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-16 15:17

Updated : 2026-09-16 19:42

NVD link : CVE-2026-79651

Mitre link : CVE-2026-79651

CVE.ORG link : CVE-2026-79651

JSON object : View

Products Affected

No product.

CWE

CWE-400

Uncontrolled Resource Consumption

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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."}], "lastModified": "2026-09-16T19:42:43.623", "sourceIdentifier": "secalert@redhat.com"}