{"id":"CVE-2026-116748","published":"2026-10-26T22:16:59.610","lastModified":"2026-10-26T22:16:59.610","description":"Transmission 4.0.0 before 4.1.3 contains a permissive CORS vulnerability in handle_request() in rpc-server.cc that exposes the X-Transmission-Session-Id anti-CSRF token to any web origin. Malicious web pages can read the token from the 409 handshake response and replay it to issue RPC calls, enabling script-torrent-done execution, download-dir changes, or torrent and data deletion.","cvssScore":8.8,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwes":["CWE-942"],"vendors":[],"products":[],"references":[{"url":"https://github.com/transmission/transmission","tags":[]},{"url":"https://github.com/transmission/transmission/blob/4.1.2/libtransmission/rpc-server.cc#L560","tags":[]},{"url":"https://github.com/transmission/transmission/commit/c6a1bd2017a0fea9c956737c213f23e4b0f7929e","tags":[]},{"url":"https://github.com/transmission/transmission/pull/8938","tags":[]},{"url":"https://github.com/transmission/transmission/releases/tag/4.1.3","tags":[]},{"url":"https://joshua.hu/transmission-cors-rpc-csrf-rce-drive-by-exploit","tags":[]},{"url":"https://www.vulncheck.com/advisories/transmission-4.0.0-before-4.1.3-permissive-cors-leaks-rpc-anti-csrf-token","tags":[]}],"exploitRefs":[{"url":"https://github.com/transmission/transmission","tags":[]},{"url":"https://github.com/transmission/transmission/blob/4.1.2/libtransmission/rpc-server.cc#L560","tags":[]},{"url":"https://github.com/transmission/transmission/commit/c6a1bd2017a0fea9c956737c213f23e4b0f7929e","tags":[]},{"url":"https://github.com/transmission/transmission/pull/8938","tags":[]},{"url":"https://github.com/transmission/transmission/releases/tag/4.1.3","tags":[]}],"hasPoc":true,"ai":null}