{"id":"DEBIAN-CVE-2026-116748","details":"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.","modified":"2026-10-27T20:00:07.734438988Z","published":"2026-10-26T22:16:59.610Z","upstream":["CVE-2026-116748"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-116748"}],"affected":[{"package":{"name":"transmission","ecosystem":"Debian:12","purl":"pkg:deb/debian/transmission?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.00-2.1","3.00-2.1+deb12u1","4.0.1-1","4.0.2-1","4.0.5-1","4.0.5-2","4.0.5-3","4.0.6+dfsg-1","4.0.6+dfsg-2","4.0.6+dfsg-3","4.1.0+dfsg-1","4.1.0+dfsg-1~bpo13+1","4.1.0~beta1+dfsg-1","4.1.0~beta2+dfsg-1","4.1.0~beta2+dfsg-2","4.1.0~beta2+dfsg-3","4.1.0~beta2+dfsg-4","4.1.0~beta2+dfsg-5","4.1.0~beta3+dfsg-1","4.1.0~beta4+dfsg-1","4.1.0~beta5+dfsg-1","4.1.1+dfsg-1","4.1.1+dfsg-1~bpo13+1","4.1.2+dfsg-1","4.1.2+dfsg-1~bpo13+1","4.1.3+dfsg-1","4.1.3+dfsg-1~bpo13+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-116748.json"}},{"package":{"name":"transmission","ecosystem":"Debian:13","purl":"pkg:deb/debian/transmission?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.1.0+dfsg-1","4.1.0+dfsg-1~bpo13+1","4.1.0~beta2+dfsg-3","4.1.0~beta2+dfsg-3+deb13u1","4.1.0~beta2+dfsg-3+deb13u2","4.1.0~beta2+dfsg-4","4.1.0~beta2+dfsg-5","4.1.0~beta3+dfsg-1","4.1.0~beta4+dfsg-1","4.1.0~beta5+dfsg-1","4.1.1+dfsg-1","4.1.1+dfsg-1~bpo13+1","4.1.2+dfsg-1","4.1.2+dfsg-1~bpo13+1","4.1.3+dfsg-1","4.1.3+dfsg-1~bpo13+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-116748.json"}},{"package":{"name":"transmission","ecosystem":"Debian:14","purl":"pkg:deb/debian/transmission?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.3+dfsg-1"}]}],"versions":["4.1.0+dfsg-1","4.1.0+dfsg-1~bpo13+1","4.1.0~beta2+dfsg-3","4.1.0~beta2+dfsg-4","4.1.0~beta2+dfsg-5","4.1.0~beta3+dfsg-1","4.1.0~beta4+dfsg-1","4.1.0~beta5+dfsg-1","4.1.1+dfsg-1","4.1.1+dfsg-1~bpo13+1","4.1.2+dfsg-1","4.1.2+dfsg-1~bpo13+1","4.1.3+dfsg-1~bpo13+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-116748.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}