DEBIAN-CVE-2026-56018
JavaScript::Minifier::XS versions before 0.16 for Perl leak memory on every call to minify(), allowing unbounded memory growth. In JsMinify (XS.xs) the cleanup frees only the NodeSet structures and never the per-token contents buffers allocated in JsSetNodeContents; JsDiscardNode unlinks nodes without freeing their contents. Each token's contents buffer is therefore leaked on every call, and the two early returns taken when the node list is empty leak the whole NodeSet. A long-lived process that minifies repeatedly, such as an asset pipeline or a server-side minifier endpoint, grows in memory without bound until it exhausts available memory and is killed, causing denial of service.
DEBIAN-CVE-2026-56018
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-2026-56018
libjavascript-minifier-xs-perl
Source reference: /affected/0/package/name
- Affected versions
- 0.15-1
Source reference:
/affected/0/versions0.16-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
libjavascript-minifier-xs-perl
Source reference: /affected/1/package/name
- Affected versions
- 0.15-1
Source reference:
/affected/1/versions0.16-1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
libjavascript-minifier-xs-perl
Source reference: /affected/2/package/name
- Affected versions
- 0.15-1
Source reference:
/affected/2/versions - Fixed versions
- 0.16-1
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": "libjavascript-minifier-xs-perl",
"purl": "pkg:deb/debian/libjavascript-minifier-xs-perl?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"0.15-1",
"0.16-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-56018.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libjavascript-minifier-xs-perl",
"purl": "pkg:deb/debian/libjavascript-minifier-xs-perl?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"0.15-1",
"0.16-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-56018.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.16-1"
}
]
}
],
"package": {
"name": "libjavascript-minifier-xs-perl",
"purl": "pkg:deb/debian/libjavascript-minifier-xs-perl?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"0.15-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-56018.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57919 · Revision 1
- Added to Heist Feed
- Publisher date