{"id":"CVE-2026-116748","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-116748","generatedAt":"2026-10-28T03:39:54.558Z","title":"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.","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.","published":"2026-10-26T22:17:00.000Z","lastModified":"2026-10-27T16:03:45.000Z","status":"Awaiting Analysis","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":8.7,"severity":"HIGH","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-942"],"affected":[],"epss":{"score":0.00527,"percentile":0.44465,"date":"2026-10-27","history":[{"date":"2026-10-27","score":0.00527,"percentile":0.44465}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.53%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-26T22:17:00.000Z","detail":{"score":"8.7","severity":"HIGH","publishedAt":"2026-10-26T22:16:59.610Z"},"summary":"New CVE, high severity (CVSS 8.7)."}],"references":[{"url":"https://github.com/transmission/transmission","source":"disclosure@vulncheck.com"},{"url":"https://github.com/transmission/transmission/blob/4.1.2/libtransmission/rpc-server.cc#L560","source":"disclosure@vulncheck.com"},{"url":"https://github.com/transmission/transmission/commit/c6a1bd2017a0fea9c956737c213f23e4b0f7929e","source":"disclosure@vulncheck.com"},{"url":"https://github.com/transmission/transmission/pull/8938","source":"disclosure@vulncheck.com"},{"url":"https://github.com/transmission/transmission/releases/tag/4.1.3","source":"disclosure@vulncheck.com"},{"url":"https://joshua.hu/transmission-cors-rpc-csrf-rce-drive-by-exploit","source":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/transmission-4.0.0-before-4.1.3-permissive-cors-leaks-rpc-anti-csrf-token","source":"disclosure@vulncheck.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-116748","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}