node-cookies — security advisory
cookies is a Node.js library for reading and writing HTTP cookies, used by Koa via ctx.cookies. In versions before 0.9.2 the library validates the cookie name and value against character sets that reject the semicolon separator, but the domain and path options are checked only against a permissive RFC 7230 field-content matcher that allows semicolons, and both are written into the Set-Cookie header unescaped. An application that passes untrusted or request-derived data into the domain or path option can therefore inject additional cookie attributes, overriding SameSite, Secure, HttpOnly, or Domain on the cookies the application issues. This is a Set-Cookie attribute injection issue (CWE-74). The issue is fixed in cookies 0.9.2, which validates domain and path against RFC 6265 character sets. As a workaround, keep domain and path application-set rather than derived from untrusted input.
- Products
- node-cookies
- Affected versions
- 0.5.0-1, 0.5.0-1ubuntu1, 0.5.0-3, 0.8.0+~0.7.7-1, 0.8.0-1, 0.8.0-2, 0.9.1+~0.9.2-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-88038
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:25 UTC · Revision 1
Source evidence
cookies is a Node.js library for reading and writing HTTP cookies, used by Koa via ctx.cookies. In versions before 0.9.2 the library validates the cookie name and value against character sets that reject the semicolon separator, but the domain and path options are checked only against a permissive RFC 7230 field-content matcher that allows semicolons, and both are written into the Set-Cookie header unescaped. An application that passes untrusted or request-derived data into the domain or path option can therefore inject additional cookie attributes, overriding SameSite, Secure, HttpOnly, or Domain on the cookies the application issues. This is a Set-Cookie attribute injection issue (CWE-74). The issue is fixed in cookies 0.9.2, which validates domain and path against RFC 6265 character sets. As a workaround, keep domain and path application-set rather than derived from untrusted input.
osv:UBUNTU-CVE-2026-88038
node-cookies
Fixed versions: Not specified
node-cookies
Fixed versions: Not specified
node-cookies
Fixed versions: Not specified
node-cookies
Fixed versions: Not specified
node-cookies
Fixed versions: Not specified
node-cookies
Fixed versions: Not specified
node-cookies
Fixed versions: Not specified
Complete source record
{
"id": "f9dec24c0b2a4bffe62d50692133274a364e6c4ac45226ac768734c754857e56",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-88038",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-88038",
"summary": "cookies is a Node.js library for reading and writing HTTP cookies, used by Koa via ctx.cookies. In versions before 0.9.2 the library validates the cookie name and value against character sets that reject the semicolon separator, but the domain and path options are checked only against a permissive RFC 7230 field-content matcher that allows semicolons, and both are written into the Set-Cookie header unescaped. An application that passes untrusted or request-derived data into the domain or path option can therefore inject additional cookie attributes, overriding SameSite, Secure, HttpOnly, or Domain on the cookies the application issues. This is a Set-Cookie attribute injection issue (CWE-74). The issue is fixed in cookies 0.9.2, which validates domain and path against RFC 6265 character sets. As a workaround, keep domain and path application-set rather than derived from untrusted input.",
"evidence": "osv:UBUNTU-CVE-2026-88038",
"products": [
{
"name": {
"value": "node-cookies",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.5.0-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "node-cookies",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.5.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "0.5.0-1ubuntu1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "node-cookies",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.5.0-3",
"evidence": "/affected/2/versions"
},
{
"value": "0.8.0-1",
"evidence": "/affected/2/versions"
},
{
"value": "0.8.0-2",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "node-cookies",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.8.0-2",
"evidence": "/affected/3/versions"
},
{
"value": "0.8.0+~0.7.7-1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "node-cookies",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.8.0+~0.7.7-1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "node-cookies",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.9.1+~0.9.2-1",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "node-cookies",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.8.0+~0.7.7-1",
"evidence": "/affected/6/versions"
},
{
"value": "0.9.1+~0.9.2-1",
"evidence": "/affected/6/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-88038",
"aliases": [
"UBUNTU-CVE-2026-88038"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "node-cookies",
"purl": "pkg:deb/ubuntu/node-cookies?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"0.5.0-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88038.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-cookies",
"binary_version": "0.5.0-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "node-cookies",
"purl": "pkg:deb/ubuntu/node-cookies?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"0.5.0-1",
"0.5.0-1ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88038.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-cookies",
"binary_version": "0.5.0-1ubuntu1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "node-cookies",
"purl": "pkg:deb/ubuntu/node-cookies?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"0.5.0-3",
"0.8.0-1",
"0.8.0-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88038.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-cookies",
"binary_version": "0.8.0-2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "node-cookies",
"purl": "pkg:deb/ubuntu/node-cookies?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"0.8.0-2",
"0.8.0+~0.7.7-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88038.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-cookies",
"binary_version": "0.8.0+~0.7.7-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
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],
"package": {
"name": "node-cookies",
"purl": "pkg:deb/ubuntu/node-cookies?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"0.8.0+~0.7.7-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88038.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-cookies",
"binary_version": "0.8.0+~0.7.7-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
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"introduced": "0"
}
]
}
],
"package": {
"name": "node-cookies",
"purl": "pkg:deb/ubuntu/node-cookies?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"0.9.1+~0.9.2-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88038.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-cookies",
"binary_version": "0.9.1+~0.9.2-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "node-cookies",
"purl": "pkg:deb/ubuntu/node-cookies?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"0.8.0+~0.7.7-1",
"0.9.1+~0.9.2-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88038.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-cookies",
"binary_version": "0.9.1+~0.9.2-1"
}
]
}
}
],
"modified": "2026-10-17T13:01:14.972586220Z",
"provider": "osv",
"upstream": [
"CVE-2026-88038"
],
"references": [
"https://ubuntu.com/security/CVE-2026-88038",
"https://www.cve.org/CVERecord?id=CVE-2026-88038",
"https://github.com/pillarjs/cookies/security/advisories/GHSA-x44v-5gxf-r6hf",
"https://cna.openjsf.org/security-advisories.html"
]
},
"related_cves": [
{
"value": "CVE-2026-88038",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 361366,
"published_at": "2026-09-10T13:20:00+00:00"
}