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CVE-2026-2575

MEDIUM

5.3

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.

CVE Details

CVSS v3.1 Score5.3

SeverityMEDIUM

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published3/18/2026

Last Modified3/18/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-409

References

https://access.redhat.com/errata/RHSA-2026:3947(secalert@redhat.com)

https://access.redhat.com/errata/RHSA-2026:3948(secalert@redhat.com)

https://access.redhat.com/security/cve/CVE-2026-2575(secalert@redhat.com)

https://bugzilla.redhat.com/show_bug.cgi?id=2440149(secalert@redhat.com)

IOC Correlations

No correlations recorded

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