CVE-2026-2575

MEDIUM EPSS 39.1%
Published Mar 18, 20263mo ago · Modified Jun 17, 20262w ago
5.3 CVSS 3.1
Medium
Find Similar
Published Mar 18, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
5.3
Exploitability
3.9
Impact
1.4
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability Low

Threat Intelligence

EPSS Exploit Probability
39.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-409

Affected Products 1

VendorProductVersionRange
redhatbuild_of_keycloak*≥26.4  –  <26.4.10

References 4

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

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.