nodejs — security advisory
Node.js < 12.18.4 and < 14.11 can be exploited to perform HTTP desync attacks and deliver malicious payloads to unsuspecting users. The payloads can be crafted by an attacker to hijack user sessions, poison cookies, perform clickjacking, and a multitude of other attacks depending on the architecture of the underlying system. The attack was possible due to a bug in processing of carrier-return symbols in the HTTP header names.
- Products
- nodejs
- Affected versions
- Not specified
- Fixed versions
- 12.18.4~dfsg-1
- CVEs
- CVE-2020-8201
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 14:08 UTC · Revision 1
Source evidence
Node.js < 12.18.4 and < 14.11 can be exploited to perform HTTP desync attacks and deliver malicious payloads to unsuspecting users. The payloads can be crafted by an attacker to hijack user sessions, poison cookies, perform clickjacking, and a multitude of other attacks depending on the architecture of the underlying system. The attack was possible due to a bug in processing of carrier-return symbols in the HTTP header names.
osv:DEBIAN-CVE-2020-8201
nodejs
Fixed versions: 12.18.4~dfsg-1
nodejs
Fixed versions: 12.18.4~dfsg-1
nodejs
Fixed versions: 12.18.4~dfsg-1
Complete source record
{
"id": "cdc6e6ac6fcac8355b8ae9904aa872d47602670aa60556f7371f1a4214344e7c",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2020-8201",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2020-8201",
"summary": "Node.js < 12.18.4 and < 14.11 can be exploited to perform HTTP desync attacks and deliver malicious payloads to unsuspecting users. The payloads can be crafted by an attacker to hijack user sessions, poison cookies, perform clickjacking, and a multitude of other attacks depending on the architecture of the underlying system. The attack was possible due to a bug in processing of carrier-return symbols in the HTTP header names.",
"evidence": "osv:DEBIAN-CVE-2020-8201",
"products": [
{
"name": {
"value": "nodejs",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "12.18.4~dfsg-1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "nodejs",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "12.18.4~dfsg-1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "nodejs",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "12.18.4~dfsg-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2020-8201",
"aliases": [
"DEBIAN-CVE-2020-8201"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "12.18.4~dfsg-1"
}
]
}
],
"package": {
"name": "nodejs",
"purl": "pkg:deb/debian/nodejs?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-8201.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "12.18.4~dfsg-1"
}
]
}
],
"package": {
"name": "nodejs",
"purl": "pkg:deb/debian/nodejs?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-8201.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "12.18.4~dfsg-1"
}
]
}
],
"package": {
"name": "nodejs",
"purl": "pkg:deb/debian/nodejs?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-8201.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-26T12:02:51.547610135Z",
"provider": "osv",
"upstream": [
"CVE-2020-8201"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2020-8201"
]
},
"related_cves": [
{
"value": "CVE-2020-8201",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 453202,
"published_at": "2020-09-18T21:15:12.903+00:00"
}