DEBIAN-CVE-2026-103263
Tornado before 6.5.9 contains a path traversal vulnerability in StaticFileHandler that follows symbolic links inside the static root without confirming the resolved target stays within it. When a symlink pointing outside the static directory exists inside it, unauthenticated attackers can request it to read files such as configuration files, private keys, and application secrets accessible to the process user.
DEBIAN-CVE-2026-103263
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-103263
python-tornado
Source reference: /affected/0/package/name
- Affected versions
- 6.2.0-3
Source reference:
/affected/0/versions6.2.0-3+deb12u1Source reference:
/affected/0/versions6.2.0-3+deb12u2Source reference:
/affected/0/versions6.2.0-3+deb12u3Source reference:
/affected/0/versions6.2.0-3+deb12u4Source reference:
/affected/0/versions6.3.2-1Source reference:
/affected/0/versions6.4.0-1Source reference:
/affected/0/versions6.4.0-2Source reference:
/affected/0/versions6.4.1-1Source reference:
/affected/0/versions6.4.1-2Source reference:
/affected/0/versions6.4.1-3Source reference:
/affected/0/versions6.4.2-1Source reference:
/affected/0/versions6.4.2-2Source reference:
/affected/0/versions6.4.2-3Source reference:
/affected/0/versions6.5.2-1Source reference:
/affected/0/versions6.5.2-2Source reference:
/affected/0/versions6.5.2-3Source reference:
/affected/0/versions6.5.4-0.1Source reference:
/affected/0/versions6.5.4-1Source reference:
/affected/0/versions6.5.5-1Source reference:
/affected/0/versions6.5.5-2Source reference:
/affected/0/versions6.5.5-3Source reference:
/affected/0/versions6.5.5-4Source reference:
/affected/0/versions6.5.5-5Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
python-tornado
Source reference: /affected/1/package/name
- Affected versions
- 6.4.2-3
Source reference:
/affected/1/versions6.4.2-3+deb13u1Source reference:
/affected/1/versions6.4.2-3+deb13u2Source reference:
/affected/1/versions6.5.2-1Source reference:
/affected/1/versions6.5.2-2Source reference:
/affected/1/versions6.5.2-3Source reference:
/affected/1/versions6.5.4-0.1Source reference:
/affected/1/versions6.5.4-1Source reference:
/affected/1/versions6.5.5-1Source reference:
/affected/1/versions6.5.5-2Source reference:
/affected/1/versions6.5.5-3Source reference:
/affected/1/versions6.5.5-4Source reference:
/affected/1/versions6.5.5-5Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
python-tornado
Source reference: /affected/2/package/name
- Affected versions
- 6.4.2-3
Source reference:
/affected/2/versions6.5.2-1Source reference:
/affected/2/versions6.5.2-2Source reference:
/affected/2/versions6.5.2-3Source reference:
/affected/2/versions6.5.4-0.1Source reference:
/affected/2/versions6.5.4-1Source reference:
/affected/2/versions6.5.5-1Source reference:
/affected/2/versions6.5.5-2Source reference:
/affected/2/versions6.5.5-3Source reference:
/affected/2/versions6.5.5-4Source reference:
/affected/2/versions6.5.5-5Source reference:
/affected/2/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "python-tornado",
"purl": "pkg:deb/debian/python-tornado?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"6.2.0-3",
"6.2.0-3+deb12u1",
"6.2.0-3+deb12u2",
"6.2.0-3+deb12u3",
"6.2.0-3+deb12u4",
"6.3.2-1",
"6.4.0-1",
"6.4.0-2",
"6.4.1-1",
"6.4.1-2",
"6.4.1-3",
"6.4.2-1",
"6.4.2-2",
"6.4.2-3",
"6.5.2-1",
"6.5.2-2",
"6.5.2-3",
"6.5.4-0.1",
"6.5.4-1",
"6.5.5-1",
"6.5.5-2",
"6.5.5-3",
"6.5.5-4",
"6.5.5-5"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-103263.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "python-tornado",
"purl": "pkg:deb/debian/python-tornado?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"6.4.2-3",
"6.4.2-3+deb13u1",
"6.4.2-3+deb13u2",
"6.5.2-1",
"6.5.2-2",
"6.5.2-3",
"6.5.4-0.1",
"6.5.4-1",
"6.5.5-1",
"6.5.5-2",
"6.5.5-3",
"6.5.5-4",
"6.5.5-5"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-103263.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "python-tornado",
"purl": "pkg:deb/debian/python-tornado?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"6.4.2-3",
"6.5.2-1",
"6.5.2-2",
"6.5.2-3",
"6.5.4-0.1",
"6.5.4-1",
"6.5.5-1",
"6.5.5-2",
"6.5.5-3",
"6.5.5-4",
"6.5.5-5"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-103263.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #65344 · Revision 1
- Added to Heist Feed
- Publisher date