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Cesanta CVE debriefs

These pages are published after PatchSiren validates generated defensive summaries against stored public CVE and source evidence.

HIGH Cesanta CVE published 2026-07-09

CVE-2026-11404

CVE-2026-11404 is a high-severity vulnerability in Cesanta Mongoose, a popular embedded web server. The vulnerability exists in the built-in TLS server function mg_tls_server_recv_hello(), which does not properly validate the session_id_len byte from a TLS ClientHello. This allows a remote, unauthenticated attacker to send a crafted ClientHello with an oversized session id length, causing the server to re [truncated]