---
id: CVE-2026-110932
title: >-
  Keycloak-services: keycloak-services: unauthenticated persistent disk
  exhaustion via theme gzip cache
summary: >-
  A flaw was found in the theme resource endpoint of Keycloak, an open-source
  identity and access management solution. The issue occurs because the server
  fails to validate theme names before using them as keys for an on-disk gzip
  cache. A…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-400
vendor: Red Hat
product: keycloak-services
affected:
  - keycloak-services (all versions)
  - rhbk/keycloak-rhel9 (all versions)
  - keycloak-services
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-11-05T18:53:16.668473Z'
published: '2026-11-05'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T18:53:25.284Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-110932'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-110932'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2553049'
    label: RHBZ#2553049
tags:
  - cve.org
ingestedAt: '2026-11-05T22:38:31.482Z'
---

## Overview

A flaw was found in the theme resource endpoint of Keycloak, an open-source identity and access management solution. The issue occurs because the server fails to validate theme names before using them as keys for an on-disk gzip cache. An unauthenticated attacker can exploit this by sending many requests with unique, fabricated theme names, leading to persistent disk space exhaustion that survives server restarts and causes service disruptions.

## Affected

- `keycloak-services (all versions)`
- `rhbk/keycloak-rhel9 (all versions)`
- `keycloak-services`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

### Workarounds

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.