CVE-2026-79651
CVE CVE-2026-79651EUVD EUVD-2026-80830Published 2026-09-16T14:55:09.000ZLast changed 2026-09-16T18:09:35.000ZCVSS 7.5
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Red Hat — Red Hat build of Keycloak 26.4 patch: 26.4-26; patch: 26.4.16-2
- Red Hat — Red Hat build of Keycloak 26.6 patch: 26.6-20; patch: 26.6.7-3
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Red Hat — Red Hat build of Keycloak
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