CVE-2026-2575

[CVE catalog]

Severity

Medium · CVSS 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Published

Feb 15, 2026, 11:00:00 PM UTC

Source

[NVD] · [CVE record]

EPSS

0.65% · Oct 25, 2026

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. keycloak: Keycloak: Denial of Service due to excessive SAMLRequest decompression This MODERATE impact denial of service flaw affects Red Hat Build of Keycloak (RHBK). An unauthenticated remote attacker can exploit this by sending a highly compressed SAMLRequest through the SAML Redirect Binding. The server's inability to enforce size limits during DEFLATE decompression leads to an OutOfMemoryError, causing process termination and disrupting service availability. This vulnerability is applicable when Keycloak is configured to use SAML Redirect Binding. The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.