CVE WatchSep 16, 2026

CVE-2026-79651

A flaw was found in the theme localization endpoints of the keycloak-services component, which is the core service responsible for authentic

CVSS

7.5

High

EPSS

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KEV

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Exploit Today

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0-100

Published: Sep 16, 2026 · Last modified: Sep 16, 2026 · CWE-400

EPSS · 30d

Not enough EPSS history yet.

Technical 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.

Official references

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