{"id":"CVE-2026-73214","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-73214","summary":"Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.16.0, dtls_server_input_handler() and create_new_connected_udp_socket() in src/apps/relay/dtls_listener.c…","details":"Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.16.0, dtls_server_input_handler() and create_new_connected_udp_socket() in src/apps/relay/dtls_listener.c retain OpenSSL dtls1_reassemble_fragment() state for a 35-byte fragmented ClientHello declaring a 650,000-byte handshake before cookie validation, allowing an unauthenticated remote sender using fresh UDP tuples to exhaust memory without TURN credentials, a completed handshake, a valid cookie, or source spoofing. This issue is fixed in version 4.16.0.","published":"2026-08-11T18:18:26.773","modified":"2026-08-11T18:18:26.773","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/coturn/coturn/commit/37e13d1d60af8f1422c01b5e9f1c6bc355d03b85","label":"coturn/coturn@37e13d1"},"references":[{"type":"WEB","url":"https://github.com/coturn/coturn/commit/37e13d1d60af8f1422c01b5e9f1c6bc355d03b85"},{"type":"WEB","url":"https://github.com/coturn/coturn/commit/beb4de9dcb6a475129595b943c9a34264420df09"},{"type":"WEB","url":"https://github.com/coturn/coturn/pull/2003"},{"type":"WEB","url":"https://github.com/coturn/coturn/pull/2012"},{"type":"WEB","url":"https://github.com/coturn/coturn/releases/tag/4.16.0"},{"type":"WEB","url":"https://github.com/coturn/coturn/security/advisories/GHSA-5x2p-4vqj-f6m4"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-08-11T18:18:26.773"}}