VULNERABILITY INTELLIGENCE

CVE-2026-2575

CVSS score5.3 MEDIUM
EPSS probability0.87%
CISA KEVNot currently listed
Published2026-03-18
Last modified2026-10-06
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Description

A flaw was found in Keycloak. An unauthenticated remote attacker can trigger an application level Denial of Service (DoS) by sending a highly compressed SAMLRequest through the SAML Redirect Binding. The server fails to enforce size limits during DEFLATE decompression, leading to an OutOfMemoryError (OOM) and subsequent process termination. This vulnerability allows an attacker to disrupt the availability of the service.

Weakness classification

  • CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)

Primary references