{"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": "2026-10-26T21:52:45.799Z"}, "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"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "packageURL": "pkg:github/transmission/transmission", "product": "transmission", "repo": "https://github.com/transmission/transmission", "vendor": "transmission", "versions": [{"lessThan": "4.1.3", "status": "affected", "version": "4.0.0", "versionType": "semver"}]}], "source": "[email protected]"}], "cveTags": [], "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."}], "id": "CVE-2026-116748", "lastModified": "2026-10-27T16:03:45.247", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "[email protected]", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.7, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "[email protected]", "type": "Secondary"}]}, "published": "2026-10-26T22:16:59.610", "references": [{"source": "[email protected]", "url": "https://github.com/transmission/transmission"}, {"source": "[email protected]", "url": "https://github.com/transmission/transmission/blob/4.1.2/libtransmission/rpc-server.cc#L560"}, {"source": "[email protected]", "url": "https://github.com/transmission/transmission/commit/c6a1bd2017a0fea9c956737c213f23e4b0f7929e"}, {"source": "[email protected]", "url": "https://github.com/transmission/transmission/pull/8938"}, {"source": "[email protected]", "url": "https://github.com/transmission/transmission/releases/tag/4.1.3"}, {"source": "[email protected]", "url": "https://joshua.hu/transmission-cors-rpc-csrf-rce-drive-by-exploit"}, {"source": "[email protected]", "url": "https://www.vulncheck.com/advisories/transmission-4.0.0-before-4.1.3-permissive-cors-leaks-rpc-anti-csrf-token"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-942"}], "source": "[email protected]", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.0.0,4.1.3)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "transmission", "source": "cna", "vendor": "transmission"}, "product": "transmission", "vendor": "transmissionbt"}], "created": "2026-10-27T07:15:08.219257+00:00", "updated": "2026-10-27T08:45:14.316590+00:00", "vendors": ["transmissionbt", "transmissionbt$PRODUCT$transmission"]}