UBUNTU-CVE-2026-116748 (CVE-2026-116748)
Vulnerability from osv_ubuntu – Published: 2026-10-27 00:00 – Updated: 2026-10-27 00:00 – Source website
VLAI
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.
Severity
8.8 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "transmission",
"binary_version": "2.84-3ubuntu3.1"
},
{
"binary_name": "transmission-cli",
"binary_version": "2.84-3ubuntu3.1"
},
{
"binary_name": "transmission-common",
"binary_version": "2.84-3ubuntu3.1"
},
{
"binary_name": "transmission-daemon",
"binary_version": "2.84-3ubuntu3.1"
},
{
"binary_name": "transmission-gtk",
"binary_version": "2.84-3ubuntu3.1"
},
{
"binary_name": "transmission-qt",
"binary_version": "2.84-3ubuntu3.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "transmission",
"purl": "pkg:deb/ubuntu/transmission@2.84-3ubuntu3.1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.84-1ubuntu1",
"2.84-2",
"2.84-3",
"2.84-3ubuntu1",
"2.84-3ubuntu2",
"2.84-3ubuntu3",
"2.84-3ubuntu3.1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "transmission",
"binary_version": "2.92-3ubuntu2"
},
{
"binary_name": "transmission-cli",
"binary_version": "2.92-3ubuntu2"
},
{
"binary_name": "transmission-common",
"binary_version": "2.92-3ubuntu2"
},
{
"binary_name": "transmission-daemon",
"binary_version": "2.92-3ubuntu2"
},
{
"binary_name": "transmission-gtk",
"binary_version": "2.92-3ubuntu2"
},
{
"binary_name": "transmission-qt",
"binary_version": "2.92-3ubuntu2"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "transmission",
"purl": "pkg:deb/ubuntu/transmission@2.92-3ubuntu2?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.92-2ubuntu3",
"2.92-3ubuntu1",
"2.92-3ubuntu2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "transmission",
"binary_version": "2.94-2ubuntu3"
},
{
"binary_name": "transmission-cli",
"binary_version": "2.94-2ubuntu3"
},
{
"binary_name": "transmission-common",
"binary_version": "2.94-2ubuntu3"
},
{
"binary_name": "transmission-daemon",
"binary_version": "2.94-2ubuntu3"
},
{
"binary_name": "transmission-gtk",
"binary_version": "2.94-2ubuntu3"
},
{
"binary_name": "transmission-qt",
"binary_version": "2.94-2ubuntu3"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "transmission",
"purl": "pkg:deb/ubuntu/transmission@2.94-2ubuntu3?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.94-2ubuntu1",
"2.94-2ubuntu2",
"2.94-2ubuntu3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "transmission",
"binary_version": "3.00-2ubuntu2.2"
},
{
"binary_name": "transmission-cli",
"binary_version": "3.00-2ubuntu2.2"
},
{
"binary_name": "transmission-common",
"binary_version": "3.00-2ubuntu2.2"
},
{
"binary_name": "transmission-daemon",
"binary_version": "3.00-2ubuntu2.2"
},
{
"binary_name": "transmission-gtk",
"binary_version": "3.00-2ubuntu2.2"
},
{
"binary_name": "transmission-qt",
"binary_version": "3.00-2ubuntu2.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "transmission",
"purl": "pkg:deb/ubuntu/transmission@3.00-2ubuntu2.2?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.00-1ubuntu2",
"3.00-1ubuntu5",
"3.00-2ubuntu1",
"3.00-2ubuntu2",
"3.00-2ubuntu2.1",
"3.00-2ubuntu2.2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "transmission",
"binary_version": "4.0.5-1ubuntu0.1"
},
{
"binary_name": "transmission-cli",
"binary_version": "4.0.5-1ubuntu0.1"
},
{
"binary_name": "transmission-common",
"binary_version": "4.0.5-1ubuntu0.1"
},
{
"binary_name": "transmission-daemon",
"binary_version": "4.0.5-1ubuntu0.1"
},
{
"binary_name": "transmission-gtk",
"binary_version": "4.0.5-1ubuntu0.1"
},
{
"binary_name": "transmission-qt",
"binary_version": "4.0.5-1ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "transmission",
"purl": "pkg:deb/ubuntu/transmission@4.0.5-1ubuntu0.1?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.0.2-1ubuntu3",
"4.0.5-1",
"4.0.5-1build3",
"4.0.5-1build4",
"4.0.5-1build5",
"4.0.5-1ubuntu0.1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "transmission",
"binary_version": "4.1.3+dfsg-1ubuntu2"
},
{
"binary_name": "transmission-cli",
"binary_version": "4.1.3+dfsg-1ubuntu2"
},
{
"binary_name": "transmission-common",
"binary_version": "4.1.3+dfsg-1ubuntu2"
},
{
"binary_name": "transmission-daemon",
"binary_version": "4.1.3+dfsg-1ubuntu2"
},
{
"binary_name": "transmission-gtk",
"binary_version": "4.1.3+dfsg-1ubuntu2"
},
{
"binary_name": "transmission-qt",
"binary_version": "4.1.3+dfsg-1ubuntu2"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.10",
"name": "transmission",
"purl": "pkg:deb/ubuntu/transmission@4.1.3+dfsg-1ubuntu2?arch=source\u0026distro=stonking"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.1.1+dfsg-1ubuntu1",
"4.1.2+dfsg-1ubuntu1",
"4.1.3+dfsg-1ubuntu1",
"4.1.3+dfsg-1ubuntu2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "transmission",
"binary_version": "4.1.1+dfsg-1ubuntu1.1"
},
{
"binary_name": "transmission-cli",
"binary_version": "4.1.1+dfsg-1ubuntu1.1"
},
{
"binary_name": "transmission-common",
"binary_version": "4.1.1+dfsg-1ubuntu1.1"
},
{
"binary_name": "transmission-daemon",
"binary_version": "4.1.1+dfsg-1ubuntu1.1"
},
{
"binary_name": "transmission-gtk",
"binary_version": "4.1.1+dfsg-1ubuntu1.1"
},
{
"binary_name": "transmission-qt",
"binary_version": "4.1.1+dfsg-1ubuntu1.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "transmission",
"purl": "pkg:deb/ubuntu/transmission@4.1.1+dfsg-1ubuntu1.1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.1.0~beta2+dfsg-3ubuntu1",
"4.1.0~beta2+dfsg-3ubuntu2",
"4.1.0~beta4+dfsg-1ubuntu1",
"4.1.0~beta5+dfsg-1ubuntu1",
"4.1.0+dfsg-1ubuntu1",
"4.1.1+dfsg-1ubuntu1",
"4.1.1+dfsg-1ubuntu1.1"
]
}
],
"aliases": [],
"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.",
"id": "UBUNTU-CVE-2026-116748",
"modified": "2026-10-27T00:00:00Z",
"published": "2026-10-27T00:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-116748"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-116748"
},
{
"type": "REPORT",
"url": "https://github.com/transmission/transmission"
},
{
"type": "REPORT",
"url": "https://github.com/cveproject/cvelistv5/tree/main/cves/2026/116xxx/cve-2026-116748.json"
},
{
"type": "REPORT",
"url": "https://github.com/transmission/transmission/blob/4.1.2/libtransmission/rpc-server.cc#l560"
},
{
"type": "REPORT",
"url": "https://github.com/transmission/transmission/commit/c6a1bd2017a0fea9c956737c213f23e4b0f7929e"
},
{
"type": "REPORT",
"url": "https://github.com/transmission/transmission/pull/8938"
},
{
"type": "REPORT",
"url": "https://github.com/transmission/transmission/releases/tag/4.1.3"
},
{
"type": "REPORT",
"url": "https://joshua.hu/transmission-cors-rpc-csrf-rce-drive-by-exploit"
},
{
"type": "REPORT",
"url": "https://nvd.nist.gov/vuln/detail/cve-2026-116748"
},
{
"type": "REPORT",
"url": "https://www.vulncheck.com/advisories/transmission-4.0.0-before-4.1.3-permissive-cors-leaks-rpc-anti-csrf-token"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "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",
"type": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-116748"
]
}
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