Vulnerability in Red Hat Build Of Keycloak 26.4

CVE-2026-2575

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…

EPSS: 0.000 (9.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-2575?
CVE-2026-2575 is a medium-severity vulnerability in Red Hat Build Of Keycloak 26.4, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 5.3/10. Published 2026-03-18.
How severe is CVE-2026-2575?
Medium severity. CVSS v3 base score is 5.3 out of 10.