What is CVE-2026-82965?

CVE-2026-82965 is a high-severity vulnerability in Red Hat Single Sign-On 7, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-11-05.

How severe is CVE-2026-82965?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Red Hat Single Sign-On 7

CVE-2026-82965

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.

Vulnerability class: DoS (Denial of Service)

Published 2026-11-05 · last modified 2026-11-06.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Red Hat Single Sign-On 7

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

RHSA-2026:95759 (vendor-advisory)
RHSA-2026:95760 (vendor-advisory)
RHSA-2026:95761 (vendor-advisory)
RHSA-2026:95762 (vendor-advisory)
access.redhat.com/security/cve/CVE-2026-82965 (vdb-entry)
RHBZ#2526302 (issue-tracking)

Frequently asked questions

What is CVE-2026-82965?: CVE-2026-82965 is a high-severity vulnerability in Red Hat Single Sign-On 7, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-11-05.
How severe is CVE-2026-82965?: High severity. CVSS v3 base score is 7.5 out of 10.