DEBIAN-CVE-2026-55202
Tinyproxy through 1.11.3, fixed in commit 09312a1, fails to properly validate the Host header during stathost detection, allowing unauthenticated attackers to access the stats page by injecting a matching Host header or bypass detection via port manipulation. Remote attackers can trigger unauthorized access to internal proxy statistics or misroute requests as transparent proxy connections to circumvent access controls.
DEBIAN-CVE-2026-55202
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-2026-55202
tinyproxy
Source reference: /affected/0/package/name
- Affected versions
- 1.11.1-2.1
Source reference:
/affected/0/versions1.11.1-2.1+deb12u1Source reference:
/affected/0/versions1.11.1-3Source reference:
/affected/0/versions1.11.1-4Source reference:
/affected/0/versions1.11.2-1Source reference:
/affected/0/versions1.11.2-1~bpo12+1Source reference:
/affected/0/versions1.11.3-1Source reference:
/affected/0/versions1.11.3-1~bpo13+1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
tinyproxy
Source reference: /affected/1/package/name
- Affected versions
- 1.11.2-1
Source reference:
/affected/1/versions1.11.3-1Source reference:
/affected/1/versions1.11.3-1~bpo13+1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
tinyproxy
Source reference: /affected/2/package/name
- Affected versions
- 1.11.2-1
Source reference:
/affected/2/versions1.11.3-1Source reference:
/affected/2/versions1.11.3-1~bpo13+1Source 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": "tinyproxy",
"purl": "pkg:deb/debian/tinyproxy?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1.11.1-2.1",
"1.11.1-2.1+deb12u1",
"1.11.1-3",
"1.11.1-4",
"1.11.2-1",
"1.11.2-1~bpo12+1",
"1.11.3-1",
"1.11.3-1~bpo13+1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55202.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "tinyproxy",
"purl": "pkg:deb/debian/tinyproxy?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1.11.2-1",
"1.11.3-1",
"1.11.3-1~bpo13+1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55202.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "tinyproxy",
"purl": "pkg:deb/debian/tinyproxy?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.11.2-1",
"1.11.3-1",
"1.11.3-1~bpo13+1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55202.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57853 · Revision 1
- Added to Heist Feed
- Publisher date