CVE-2026-2575

Published: Mar 18, 2026Modified: Jun 17, 2026

5.3

Vector

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

Exploitability: 3.9 / Impact: 1.4

Source: secalert@redhat.com (Secondary)

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.

Affected (1)

Products: Redhat: Build Of Keycloak

1 product

Build Of Keycloak

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Redhat Build Of Keycloak	From 26.4 to 26.4.10

Related CWEs

Improper Handling of Highly Compressed Data (Data Amplification)

The product does not handle or incorrectly handles a compressed input with a very high compression ratio that produces a large output.

References (4)

https://access.redhat.com/errata/RHSA-2026:3947

Source: secalert@redhat.com

Vendor Advisory

https://access.redhat.com/errata/RHSA-2026:3948

Source: secalert@redhat.com

Vendor Advisory

https://access.redhat.com/security/cve/CVE-2026-2575

Source: secalert@redhat.com

Vendor Advisory

https://bugzilla.redhat.com/show_bug.cgi?id=2440149

Source: secalert@redhat.com

Issue TrackingVendor Advisory

Timeline

No history available yet.