---
id: CVE-2026-82965
title: >-
  Keycloak-services: keycloak-services: unauthenticated denial of service via
  saml soap endpoint unbounded xml parsing
summary: >-
  A flaw was found in the SAML implementation of Keycloak, an open-source
  identity and access management solution. The SAML Artifact Resolution and ECP
  SOAP endpoints do not properly limit the size or complexity of incoming XML
  requests. 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/rhbk-openshift-rhel9
affected:
  - keycloak/rhbk-openshift-rhel9 (all versions)
  - keycloak-services (all versions)
  - rhbk/keycloak-rhel9 (all versions)
  - keycloak-services (all versions)
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-11-05T18:51:05.181850Z'
published: '2026-11-05'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T18:51:14.642Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-82965'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-82965'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2526302'
    label: RHBZ#2526302
tags:
  - cve.org
ingestedAt: '2026-11-05T22:38:31.481Z'
---

## Overview

A flaw was found in the SAML implementation of Keycloak, an open-source identity and access management solution. The SAML Artifact Resolution and ECP SOAP endpoints do not properly limit the size or complexity of incoming XML requests. An unauthenticated remote attacker can exploit this by sending specially crafted, large XML messages that cause the server to consume excessive memory. This leads to the application running out of memory and crashing, resulting in a denial of service for all users.

## Affected

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

## 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.