{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-116748", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-10-26T20:23:37.457Z", "datePublished": "2026-10-26T21:52:45.799Z", "dateUpdated": "2026-10-31T02:02:38.641Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-10-26T21:52:45.799Z" }, "datePublic": "2026-06-25T00:00:00.000Z", "title": "Transmission 4.0.0 before 4.1.3 Permissive CORS Leaks RPC Anti-CSRF Token", "descriptions": [ { "lang": "en", "value": "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." } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "description": "Permissive Cross-domain Security Policy with Untrusted Domains", "cweId": "CWE-942", "type": "CWE" } ] } ], "affected": [ { "vendor": "transmission", "product": "transmission", "defaultStatus": "unaffected", "versions": [ { "version": "4.0.0", "status": "affected", "versionType": "semver", "lessThan": "4.1.3" } ], "packageURL": "pkg:github/transmission/transmission", "repo": "https://github.com/transmission/transmission" } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:transmissionbt:transmission:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.0.0", "versionEndExcluding": "4.1.3" } ] } ] } ], "metrics": [ { "format": "CVSS", "cvssV4_0": { "version": "4.0", "vectorString": "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", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH" } }, { "format": "CVSS", "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH" } } ], "references": [ { "url": "https://github.com/transmission/transmission/pull/8938", "tags": [ "issue-tracking", "patch" ], "name": "Pull Request #8938" }, { "url": "https://github.com/transmission/transmission/commit/c6a1bd2017a0fea9c956737c213f23e4b0f7929e", "tags": [ "patch" ], "name": "Patch Commit" }, { "url": "https://github.com/transmission/transmission", "tags": [ "product" ] }, { "url": "https://github.com/transmission/transmission/releases/tag/4.1.3", "tags": [ "release-notes" ], "name": "transmission 4.1.3 Release Notes" }, { "url": "https://github.com/transmission/transmission/blob/4.1.2/libtransmission/rpc-server.cc#L560", "tags": [ "technical-description" ] }, { "url": "https://joshua.hu/transmission-cors-rpc-csrf-rce-drive-by-exploit", "tags": [ "third-party-advisory" ] }, { "name": "VulnCheck Advisory: Transmission 4.0.0 before 4.1.3 Permissive CORS Leaks RPC Anti-CSRF Token", "tags": [ "third-party-advisory" ], "url": "https://www.vulncheck.com/advisories/transmission-4.0.0-before-4.1.3-permissive-cors-leaks-rpc-anti-csrf-token" } ], "credits": [ { "lang": "en", "value": "Joshua Rogers", "type": "finder" }, { "lang": "en", "value": "ckerr", "type": "remediation developer" } ], "x_generator": { "engine": "vulncheck-endgame" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-10-31T02:02:29.585820Z", "id": "CVE-2026-116748", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-31T02:02:38.641Z" } } ] } }