CVE-2026-5244 Cesanta Mongoose TLS 1.3 mongoose.c mg_tls_recv_cert heap-based overflow

A vulnerability has been found in Cesanta Mongoose up to 7.20. This affects the function mgtlsrecvcert of the file mongoose.c of the component TLS 1.3 Handler. Such manipulation of the argument pubkey leads to heap-based buffer overflow. The attack may be launched remotely. The exploit has been...