transmission: Transmission 4.0.0 before 4.1.3 contains a permissive CORS vulnerability in handle_request() in rpc-server.cc that ex...
CVE-2026-116748 is fixed in transmission on 1 platform by DEBIAN-CVE-2026-116748 (version 4.1.3+dfsg-1), released October 27, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| transmission · Debian 14 | 4.1.3+dfsg-1 | DEBIAN-CVE-2026-116748 | Oct 27, 2026 |
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