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
- RHSA-2026:68276 access.redhat.com
- RHSA-2026:68277 access.redhat.com
- RHSA-2026:68278 access.redhat.com
- RHSA-2026:68280 access.redhat.com
- access.redhat.com access.redhat.com
- RHBZ#2523345 bugzilla.redhat.com
Timeline
- Published
- Last modified
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