CVE-2026-73252

CVE-2026-73252 · Mongoose: Unauthenticated remote heap out-of-bounds read in built-in TLS: off-by-one length check in mg_tls_recv_record() underflows recv_len to SIZE_MAX

Cette page présente des faits issus de sources publiques. Consultez l’avis original avant toute mise à jour.

Mongoose is an embedded web server and network library. Prior to 7.23, the built-in TLS stack selected by MG_TLS_BUILTIN in src/tls_builtin.c accepts a TLS 1.3 record whose decrypted size is exactly the 16-byte authentication tag with no plaintext or ContentType byte. In mg_tls_recv_record(), the msgsz length check permits that record and the recv_len calculation underflows to SIZE_MAX, so a later handshake step treats stale buffer contents as a trusted message with an effectively unbounded length. An unauthenticated malicious TLS peer can trigger a heap out-of-bounds read before certificate or Finished validation, causing a remote denial of service. This issue is fixed in version 7.23.

CVSS 7.5 · Élevée · EPSS 0,4% · Correctif disponible

Publication

2026-10-14T18:24:16.659Z

Mise à jour

2026-10-14T19:41:57.801Z

Pile logicielle: system

Vérifiez votre serveur →