Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Red Hat / Red Hat build of Keycloak 26.4 | unaffected 26.4.10-1 before * |
| Red Hat / Red Hat build of Keycloak 26.4 | unaffected 26.4-12 before * |
| Red Hat / Red Hat build of Keycloak 26.4 | unaffected 26.4-12 before * |
| Red Hat / Red Hat build of Keycloak 26.4.10 | unaffected |
| Red Hat / Red Hat Single Sign-On 7.6.13 | unaffected |
| Red Hat / Red Hat Single Sign-On 7.6 for RHEL 7 | unaffected 0:18.0.20-1.redhat_00001.1.el7sso before * |
| Red Hat / Red Hat Single Sign-On 7.6 for RHEL 8 | unaffected 0:18.0.20-1.redhat_00001.1.el8sso before * |
| Red Hat / Red Hat Single Sign-On 7.6 for RHEL 9 | unaffected 0:18.0.20-1.redhat_00001.1.el9sso before * |
| Red Hat / RHEL-8 based Middleware Containers | unaffected 7.6-85 before * |
CWE
CWE-409
References
- https://access.redhat.com/errata/RHSA-2026:3947
- https://access.redhat.com/errata/RHSA-2026:3948
- https://access.redhat.com/errata/RHSA-2026:76128
- https://access.redhat.com/errata/RHSA-2026:76129
- https://access.redhat.com/errata/RHSA-2026:76130
- https://access.redhat.com/errata/RHSA-2026:76132
- https://access.redhat.com/errata/RHSA-2026:76134
- https://access.redhat.com/security/cve/CVE-2026-2575
- https://bugzilla.redhat.com/show_bug.cgi?id=2440149
ADP enrichment
No English description supplied.
No references supplied.