DEBIAN-CVE-2026-54387
Tinyproxy through 1.11.3, fixed in commit ff45d3b, fails to reconcile conflicting Content-Length and Transfer-Encoding: chunked headers, forwarding both verbatim to the backend while using Content-Length to determine how many request body bytes to consume. Remote attackers can desynchronize the proxy and backend parser state, allowing injection of arbitrary HTTP requests to the backend to enable cache poisoning, access control bypass, and request hijacking.
DEBIAN-CVE-2026-54387
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-2026-54387
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-2026-54387.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-2026-54387.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-2026-54387.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57819 · Revision 1
- Added to Heist Feed
- Publisher date