DEBIAN-CVE-2026-4926
Impact: A bad regular expression is generated any time you have multiple sequential optional groups (curly brace syntax), such as `{a}{b}{c}:z`. The generated regex grows exponentially with the number of groups, causing denial of service. Patches: Fixed in version 8.4.0. Workarounds: Limit the number of sequential optional groups in route patterns. Avoid passing user-controlled input as route patterns.
DEBIAN-CVE-2026-4926
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-2026-4926
node-path-to-regexp
Source reference: /affected/0/package/name
- Affected versions
- 6.2.1-1
Source reference:
/affected/0/versions6.3.0-1Source reference:
/affected/0/versions8.3.0-1Source reference:
/affected/0/versions8.4.0-1Source reference:
/affected/0/versions8.4.1-1Source reference:
/affected/0/versions8.4.2-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
node-path-to-regexp
Source reference: /affected/1/package/name
- Affected versions
- 6.3.0-1
Source reference:
/affected/1/versions8.3.0-1Source reference:
/affected/1/versions8.4.0-1Source reference:
/affected/1/versions8.4.1-1Source reference:
/affected/1/versions8.4.2-1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
node-path-to-regexp
Source reference: /affected/2/package/name
- Affected versions
- 6.3.0-1
Source reference:
/affected/2/versions8.3.0-1Source reference:
/affected/2/versions - Fixed versions
- 8.4.0-1
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-path-to-regexp",
"purl": "pkg:deb/debian/node-path-to-regexp?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"6.2.1-1",
"6.3.0-1",
"8.3.0-1",
"8.4.0-1",
"8.4.1-1",
"8.4.2-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-4926.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "node-path-to-regexp",
"purl": "pkg:deb/debian/node-path-to-regexp?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"6.3.0-1",
"8.3.0-1",
"8.4.0-1",
"8.4.1-1",
"8.4.2-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-4926.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "8.4.0-1"
}
]
}
],
"package": {
"name": "node-path-to-regexp",
"purl": "pkg:deb/debian/node-path-to-regexp?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"6.3.0-1",
"8.3.0-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-4926.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57244 · Revision 1
- Added to Heist Feed
- Publisher date