CVE-2026-18212
HIGH
NVD
CVSS Score
7.5
Severity
HIGH
Published
Sep 16, 2026
Vendor
unknown
Description
A flaw was found in the SAML Redirect Binding implementation of Keycloak, an open-source identity and access management solution. The issue occurs because the custom DEFLATE compression and decompression helpers fail to release native zlib memory after use. An unauthenticated attacker can exploit this by sending repeated malformed SAML requests, leading to native memory exhaustion and a denial of service.