DEBIAN-CVE-2026-82562
### Summary When `qs.parse` is called with `comma: true` and `throwOnLimitExceeded: true`, a comma-separated value under a bracket-push key (`a[]=1,2,3,4`) is split into an array without being compared against `arrayLimit`, while the same value under a flat key (`a=1,2,3,4`), an indexed key (`a[0]=`), a nested key (`a[b]=`), or a dotted key (`a.b=` with `allowDots`) throws the documented `RangeError`. A single parameter such as `a[]=1,2,2,...` therefore produces an inner array of arbitrary length even though the caller opted into the hard limit. This is the `[]=` key form that the fix for CVE-2026-2391 (qs 6.14.2) did not cover. ### Details In `lib/parse.js`, a comma-separated value under a `[]=` key is split and then wrapped as a single nested element (`val = [val]`, so that each `a[]=x,y` group counts as one element of the outer array). The `arrayLimit` check that 6.14.2 added for comma values runs after that wrap, so for `[]=` parts it only ever saw the wrapper of length 1. 6.15.3 added a pre-split comma count so that an oversized value throws before it is allocated, but gated it on an `isFlatArrayValue` flag that `parseValues` set to `false` for any part containing `[]=`, and did not pass it for object-valued input, so the gap remained. #### PoC ```js var qs = require('qs'); var options = { comma: true, arrayLimit: 3, throwOnLimitExceeded: true }; qs.parse('a=1,2,3,4', options); // RangeError: Array limit exceeded. Only 3 elements allowed in an array. qs.parse('a[]=1,2,3,
DEBIAN-CVE-2026-82562
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-2026-82562
node-qs
Source reference: /affected/0/package/name
- Affected versions
- 6.11.0+ds+~6.9.7-3
Source reference:
/affected/0/versions6.11.0+ds+~6.9.7-4Source reference:
/affected/0/versions6.13.0+ds+~6.9.16-1Source reference:
/affected/0/versions6.14.1+ds+~6.14.0-1Source reference:
/affected/0/versions6.15.0+ds+~6.15.0-1Source reference:
/affected/0/versions6.15.0+ds+~6.15.0-2Source reference:
/affected/0/versions6.15.0+ds+~6.15.0-3Source reference:
/affected/0/versions6.15.2+ds+~6.15.1-1Source reference:
/affected/0/versions6.16.0+ds+~6.15.1-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
node-qs
Source reference: /affected/1/package/name
- Affected versions
- 6.13.0+ds+~6.9.16-1
Source reference:
/affected/1/versions6.14.1+ds+~6.14.0-1Source reference:
/affected/1/versions6.15.0+ds+~6.15.0-1Source reference:
/affected/1/versions6.15.0+ds+~6.15.0-2Source reference:
/affected/1/versions6.15.0+ds+~6.15.0-3Source reference:
/affected/1/versions6.15.2+ds+~6.15.1-1Source reference:
/affected/1/versions6.16.0+ds+~6.15.1-1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
node-qs
Source reference: /affected/2/package/name
- Affected versions
- 6.13.0+ds+~6.9.16-1
Source reference:
/affected/2/versions6.14.1+ds+~6.14.0-1Source reference:
/affected/2/versions6.15.0+ds+~6.15.0-1Source reference:
/affected/2/versions6.15.0+ds+~6.15.0-2Source reference:
/affected/2/versions6.15.0+ds+~6.15.0-3Source reference:
/affected/2/versions6.15.2+ds+~6.15.1-1Source reference:
/affected/2/versions - Fixed versions
- 6.16.0+ds+~6.15.1-1
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-qs",
"purl": "pkg:deb/debian/node-qs?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"6.11.0+ds+~6.9.7-3",
"6.11.0+ds+~6.9.7-4",
"6.13.0+ds+~6.9.16-1",
"6.14.1+ds+~6.14.0-1",
"6.15.0+ds+~6.15.0-1",
"6.15.0+ds+~6.15.0-2",
"6.15.0+ds+~6.15.0-3",
"6.15.2+ds+~6.15.1-1",
"6.16.0+ds+~6.15.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-82562.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "node-qs",
"purl": "pkg:deb/debian/node-qs?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"6.13.0+ds+~6.9.16-1",
"6.14.1+ds+~6.14.0-1",
"6.15.0+ds+~6.15.0-1",
"6.15.0+ds+~6.15.0-2",
"6.15.0+ds+~6.15.0-3",
"6.15.2+ds+~6.15.1-1",
"6.16.0+ds+~6.15.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-82562.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "6.16.0+ds+~6.15.1-1"
}
]
}
],
"package": {
"name": "node-qs",
"purl": "pkg:deb/debian/node-qs?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"6.13.0+ds+~6.9.16-1",
"6.14.1+ds+~6.14.0-1",
"6.15.0+ds+~6.15.0-1",
"6.15.0+ds+~6.15.0-2",
"6.15.0+ds+~6.15.0-3",
"6.15.2+ds+~6.15.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-82562.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #58362 · Revision 1
- Added to Heist Feed
- Publisher date