DEBIAN-CVE-2026-87859
morgan is an HTTP request logger middleware for Node.js. In versions before 1.12.1, its escapeLogField() function does not escape the double quote character, which delimits the quoted fields of the Apache combined log format that morgan emits. An unauthenticated remote attacker who controls a value written to a quoted field, such as the User-Agent or Referer header, can include a double quote to close that field early, so a log consumer that parses the log by field position reads attacker-supplied text as the following field. In the built-in formats this makes the recorded value differ from the value that was sent, and in custom formats that quote an attacker-controlled token before a server-controlled one it can forge values such as the response status. No newline is injected, so record separation stays intact. The issue is fixed in morgan 1.12.1, which escapes the double quote. Users should upgrade to morgan 1.12.1 or later.
DEBIAN-CVE-2026-87859
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-2026-87859
node-morgan
Source reference: /affected/0/package/name
- Affected versions
- 1.10.0+~1.9.3-1
Source reference:
/affected/0/versions1.10.1+~1.9.10-1Source reference:
/affected/0/versions1.12.0+~1.9.10-1Source reference:
/affected/0/versions1.12.1+~1.9.10-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
node-morgan
Source reference: /affected/1/package/name
- Affected versions
- 1.10.0+~1.9.3-1
Source reference:
/affected/1/versions1.10.1+~1.9.10-1Source reference:
/affected/1/versions1.12.0+~1.9.10-1Source reference:
/affected/1/versions1.12.1+~1.9.10-1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
node-morgan
Source reference: /affected/2/package/name
- Affected versions
- 1.10.0+~1.9.3-1
Source reference:
/affected/2/versions1.10.1+~1.9.10-1Source reference:
/affected/2/versions1.12.0+~1.9.10-1Source reference:
/affected/2/versions - Fixed versions
- 1.12.1+~1.9.10-1
Source reference:
/affected/2/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-morgan",
"purl": "pkg:deb/debian/node-morgan?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1.10.0+~1.9.3-1",
"1.10.1+~1.9.10-1",
"1.12.0+~1.9.10-1",
"1.12.1+~1.9.10-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-87859.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "node-morgan",
"purl": "pkg:deb/debian/node-morgan?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1.10.0+~1.9.3-1",
"1.10.1+~1.9.10-1",
"1.12.0+~1.9.10-1",
"1.12.1+~1.9.10-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-87859.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.12.1+~1.9.10-1"
}
]
}
],
"package": {
"name": "node-morgan",
"purl": "pkg:deb/debian/node-morgan?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.10.0+~1.9.3-1",
"1.10.1+~1.9.10-1",
"1.12.0+~1.9.10-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-87859.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #58522 · Revision 1
- Added to Heist Feed
- Publisher date