DEBIAN-CVE-2026-1527
ImpactWhen an application passes user-controlled input to the upgrade option of client.request(), an attacker can inject CRLF sequences (\r\n) to: * Inject arbitrary HTTP headers * Terminate the HTTP request prematurely and smuggle raw data to non-HTTP services (Redis, Memcached, Elasticsearch) The vulnerability exists because undici writes the upgrade value directly to the socket without validating for invalid header characters: // lib/dispatcher/client-h1.js:1121 if (upgrade) { header += `connection: upgrade\r\nupgrade: ${upgrade}\r\n` }
DEBIAN-CVE-2026-1527
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-2026-1527
node-undici
Source reference: /affected/0/package/name
- Affected versions
- 7.15.0+dfsg+~cs3.2.0-1
Source reference:
/affected/0/versions7.15.0+dfsg+~cs3.2.0-3Source reference:
/affected/0/versions7.16.0+dfsg+~cs3.2.0-1Source reference:
/affected/0/versions7.16.0+dfsg+~cs3.2.0-2Source reference:
/affected/0/versions7.18.2+dfsg+~cs3.2.0-1Source reference:
/affected/0/versions7.24.5+dfsg+~cs3.2.0-1Source reference:
/affected/0/versions7.24.6+dfsg+~cs3.2.0-1Source reference:
/affected/0/versions7.24.6+dfsg+~cs3.2.0-2Source reference:
/affected/0/versions7.24.6+dfsg+~cs3.2.0-3Source reference:
/affected/0/versions7.3.0+dfsg1+~cs24.12.11-1Source reference:
/affected/0/versions7.3.0+dfsg1+~cs24.12.11-2Source reference:
/affected/0/versions8.10.2+dfsg+~cs3.2.2-1Source reference:
/affected/0/versions8.5.0+dfsg+~cs3.2.0-1Source reference:
/affected/0/versions8.5.0+dfsg+~cs3.2.0-2Source reference:
/affected/0/versions8.5.0+dfsg+~cs3.2.0-3Source reference:
/affected/0/versions8.9.0+dfsg+~cs3.2.0-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
node-undici
Source reference: /affected/1/package/name
- Affected versions
- 7.15.0+dfsg+~cs3.2.0-1
Source reference:
/affected/1/versions7.15.0+dfsg+~cs3.2.0-3Source reference:
/affected/1/versions7.16.0+dfsg+~cs3.2.0-1Source reference:
/affected/1/versions7.16.0+dfsg+~cs3.2.0-2Source reference:
/affected/1/versions7.18.2+dfsg+~cs3.2.0-1Source reference:
/affected/1/versions7.3.0+dfsg1+~cs24.12.11-1Source reference:
/affected/1/versions7.3.0+dfsg1+~cs24.12.11-2Source reference:
/affected/1/versions - Fixed versions
- 7.24.5+dfsg+~cs3.2.0-1
Source reference:
/affected/1/ranges - 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": "node-undici",
"purl": "pkg:deb/debian/node-undici?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"7.15.0+dfsg+~cs3.2.0-1",
"7.15.0+dfsg+~cs3.2.0-3",
"7.16.0+dfsg+~cs3.2.0-1",
"7.16.0+dfsg+~cs3.2.0-2",
"7.18.2+dfsg+~cs3.2.0-1",
"7.24.5+dfsg+~cs3.2.0-1",
"7.24.6+dfsg+~cs3.2.0-1",
"7.24.6+dfsg+~cs3.2.0-2",
"7.24.6+dfsg+~cs3.2.0-3",
"7.3.0+dfsg1+~cs24.12.11-1",
"7.3.0+dfsg1+~cs24.12.11-2",
"8.10.2+dfsg+~cs3.2.2-1",
"8.5.0+dfsg+~cs3.2.0-1",
"8.5.0+dfsg+~cs3.2.0-2",
"8.5.0+dfsg+~cs3.2.0-3",
"8.9.0+dfsg+~cs3.2.0-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-1527.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.24.5+dfsg+~cs3.2.0-1"
}
]
}
],
"package": {
"name": "node-undici",
"purl": "pkg:deb/debian/node-undici?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"7.15.0+dfsg+~cs3.2.0-1",
"7.15.0+dfsg+~cs3.2.0-3",
"7.16.0+dfsg+~cs3.2.0-1",
"7.16.0+dfsg+~cs3.2.0-2",
"7.18.2+dfsg+~cs3.2.0-1",
"7.3.0+dfsg1+~cs24.12.11-1",
"7.3.0+dfsg1+~cs24.12.11-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-1527.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56123 · Revision 1
- Added to Heist Feed
- Publisher date