keycloak-services: keycloak-services: SAML Redirect DEFLATE helpers leak native zlib state

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...

CVE-2026-18212

Keycloak 's SAML Redirect Binding implementation is affected by a native memory leak. The custom DEFLATE compression and decompression helpers fail to release native zlib memory after processing, so an unauthenticated attacker can send repeated malformed SAML requests to exhaust native memory and...

CVE-2026-87776

compression is a Node.js and Express compression middleware. In versions before 1.8.2, when a client aborts the connection while a compressed response is still being sent, the zlib stream created to compress that response is never destroyed, so each aborted compressed response leaks its native zl...