CVE-2026-2575

Name: CVE-2026-2575
Creator: NVD / NIST
Published: 2026-03-18T04:17:16.783+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.50%

Last modified Jun 17, 2026

CVE-2026-2575 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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. EPSS estimates a 0.50% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

0.50%

39.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-409

Affected Software

Vendor	Product	Versions
Redhat	Build Of Keycloak	>= 26.4, < 26.4.10

References

https://access.redhat.com/errata/RHSA-2026:3947Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:3948Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-2575Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2440149Issue Tracking, Vendor Advisory

Timeline

Published: Mar 18, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-2575?

How severe is CVE-2026-2575?

CVE-2026-2575 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.50% probability of exploitation in the next 30 days.

How do I fix CVE-2026-2575?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-2575?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST