MediumFix available
guzzle — security advisory
guzzlehttp/guzzle versions before 7.15.1 contain a denial of service vulnerability in the CookieJar that accepts unlimited Set-Cookie header fields with no size restrictions. Attackers can return many large cookies from a malicious server, causing Guzzle to store excessive data in memory and generate oversized Cookie headers that fail in handlers or destination servers.
- Products
- guzzle
- Affected versions
- 7.11.0-1, 7.12.0-1, 7.12.1-1, 7.12.3-1, 7.13.1-1, 7.14.0-1, 7.14.1-1, 7.14.2-1, 7.15.0-1, 7.15.1-1, 7.15.2-1, 7.15.3-1, 7.15.5-1, 7.4.5-1, 7.9.2-0.1, 8.0.1-1, 8.0.2-1, 8.1.0-1, 8.2.0-1
- Fixed versions
- 7.15.1-1
- CVEs
- CVE-2026-67353
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 11:06 UTC · Revision 1
Source evidence
guzzlehttp/guzzle versions before 7.15.1 contain a denial of service vulnerability in the CookieJar that accepts unlimited Set-Cookie header fields with no size restrictions. Attackers can return many large cookies from a malicious server, causing Guzzle to store excessive data in memory and generate oversized Cookie headers that fail in handlers or destination servers.
osv:DEBIAN-CVE-2026-67353
guzzle
Fixed versions: Not specified
guzzle
Fixed versions: Not specified
guzzle
Fixed versions: 7.15.1-1
Complete source record
{
"id": "1e1d2515023f1c36db171a03b48ef39c3b95ad481a7d24395bfed6e5639e8738",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-67353",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-67353",
"summary": "guzzlehttp/guzzle versions before 7.15.1 contain a denial of service vulnerability in the CookieJar that accepts unlimited Set-Cookie header fields with no size restrictions. Attackers can return many large cookies from a malicious server, causing Guzzle to store excessive data in memory and generate oversized Cookie headers that fail in handlers or destination servers.",
"evidence": "osv:DEBIAN-CVE-2026-67353",
"products": [
{
"name": {
"value": "guzzle",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "7.11.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "7.12.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "7.12.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "7.12.3-1",
"evidence": "/affected/0/versions"
},
{
"value": "7.13.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "7.14.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "7.14.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "7.14.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "7.15.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "7.15.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "7.15.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "7.15.3-1",
"evidence": "/affected/0/versions"
},
{
"value": "7.15.5-1",
"evidence": "/affected/0/versions"
},
{
"value": "7.4.5-1",
"evidence": "/affected/0/versions"
},
{
"value": "7.9.2-0.1",
"evidence": "/affected/0/versions"
},
{
"value": "8.0.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "8.0.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "8.1.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.0-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "guzzle",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "7.11.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "7.12.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "7.12.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "7.12.3-1",
"evidence": "/affected/1/versions"
},
{
"value": "7.13.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "7.14.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "7.14.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "7.14.2-1",
"evidence": "/affected/1/versions"
},
{
"value": "7.15.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "7.15.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "7.15.2-1",
"evidence": "/affected/1/versions"
},
{
"value": "7.15.3-1",
"evidence": "/affected/1/versions"
},
{
"value": "7.15.5-1",
"evidence": "/affected/1/versions"
},
{
"value": "7.9.2-0.1",
"evidence": "/affected/1/versions"
},
{
"value": "8.0.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "8.0.2-1",
"evidence": "/affected/1/versions"
},
{
"value": "8.1.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "8.2.0-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "guzzle",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "7.15.1-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "7.11.0-1",
"evidence": "/affected/2/versions"
},
{
"value": "7.12.0-1",
"evidence": "/affected/2/versions"
},
{
"value": "7.12.1-1",
"evidence": "/affected/2/versions"
},
{
"value": "7.12.3-1",
"evidence": "/affected/2/versions"
},
{
"value": "7.13.1-1",
"evidence": "/affected/2/versions"
},
{
"value": "7.14.0-1",
"evidence": "/affected/2/versions"
},
{
"value": "7.14.1-1",
"evidence": "/affected/2/versions"
},
{
"value": "7.14.2-1",
"evidence": "/affected/2/versions"
},
{
"value": "7.15.0-1",
"evidence": "/affected/2/versions"
},
{
"value": "7.9.2-0.1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-67353",
"aliases": [
"DEBIAN-CVE-2026-67353"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "guzzle",
"purl": "pkg:deb/debian/guzzle?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"7.11.0-1",
"7.12.0-1",
"7.12.1-1",
"7.12.3-1",
"7.13.1-1",
"7.14.0-1",
"7.14.1-1",
"7.14.2-1",
"7.15.0-1",
"7.15.1-1",
"7.15.2-1",
"7.15.3-1",
"7.15.5-1",
"7.4.5-1",
"7.9.2-0.1",
"8.0.1-1",
"8.0.2-1",
"8.1.0-1",
"8.2.0-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-67353.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "guzzle",
"purl": "pkg:deb/debian/guzzle?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"7.11.0-1",
"7.12.0-1",
"7.12.1-1",
"7.12.3-1",
"7.13.1-1",
"7.14.0-1",
"7.14.1-1",
"7.14.2-1",
"7.15.0-1",
"7.15.1-1",
"7.15.2-1",
"7.15.3-1",
"7.15.5-1",
"7.9.2-0.1",
"8.0.1-1",
"8.0.2-1",
"8.1.0-1",
"8.2.0-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-67353.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.15.1-1"
}
]
}
],
"package": {
"name": "guzzle",
"purl": "pkg:deb/debian/guzzle?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"7.11.0-1",
"7.12.0-1",
"7.12.1-1",
"7.12.3-1",
"7.13.1-1",
"7.14.0-1",
"7.14.1-1",
"7.14.2-1",
"7.15.0-1",
"7.9.2-0.1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-67353.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-09T09:47:22.397939099Z",
"provider": "osv",
"upstream": [
"CVE-2026-67353"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-67353"
]
},
"related_cves": [
{
"value": "CVE-2026-67353",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 111411,
"published_at": "2026-08-01T13:17:06+00:00"
}