CVE-2026-82965 (GCVE-0-2026-82965)

Vulnerability from cvelistv5 – Published: 2026-11-05 17:14 – Updated: 2026-11-05 18:51
VLAI
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. 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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 18:51 UTC
CWE
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
redhat CNA under the redhat root
CNA scorecard B 82/100 over 1111 records in the last 180 days details
References
URL Tags
https://access.redhat.com/security/cve/CVE-2026-82965 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2526302 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version CPE status
Red Hat Red Hat Build of Keycloak     cpe:/a:redhat:build_keycloak:
Create a notification for this product.
Red Hat Red Hat Single Sign-On 7     cpe:/a:redhat:red_hat_single_sign_on:7
Create a notification for this product.
Date Public
2026-11-05 00:00
Show details on NVD website
To clipboard 

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