PT-2026-26027 · Red Hat · Red Hat Build Of Keycloak 26.4+1

Published 2026-03-18 · Updated 2026-03-18 · CVE-2026-2575

NVD

CVSS v3.1

5.3

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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.

Fix

Weakness Enumeration

CWE-409

Related Identifiers

CVE-2026-2575

Affected Products

Red Hat Build Of Keycloak 26.4

Red Hat Build Of Keycloak 26.4.10

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-2575 · Security Note
• https://access.redhat.com/errata/RHSA-2026:3947 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:3948 · Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2440149 · Note
• https://access.redhat.com/security/cve/CVE-2026-2575 · Note