MediumFix available
guzzle — security advisory
guzzlehttp/guzzle versions before 7.14.2 fail to properly isolate Proxy-Authorization headers from origin servers in cURL handlers. Attackers can capture proxy credentials through origin server access logs when requests are redirected, bypassed, or sent through SOCKS proxies that Guzzle misclassifies as direct connections.
- 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
- 7.14.2-1
- CVEs
- CVE-2026-67339
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 11:06 UTC · Revision 1
Source evidence
guzzlehttp/guzzle versions before 7.14.2 fail to properly isolate Proxy-Authorization headers from origin servers in cURL handlers. Attackers can capture proxy credentials through origin server access logs when requests are redirected, bypassed, or sent through SOCKS proxies that Guzzle misclassifies as direct connections.
osv:DEBIAN-CVE-2026-67339
guzzle
Fixed versions: Not specified
guzzle
Fixed versions: Not specified
guzzle
Fixed versions: 7.14.2-1
Complete source record
{
"id": "4ac40557e447617f76a4086648751f74b1843019518ed862317db01dea21be3f",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-67339",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-67339",
"summary": "guzzlehttp/guzzle versions before 7.14.2 fail to properly isolate Proxy-Authorization headers from origin servers in cURL handlers. Attackers can capture proxy credentials through origin server access logs when requests are redirected, bypassed, or sent through SOCKS proxies that Guzzle misclassifies as direct connections.",
"evidence": "osv:DEBIAN-CVE-2026-67339",
"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": "7.14.2-1",
"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": "7.9.2-0.1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-67339",
"aliases": [
"DEBIAN-CVE-2026-67339"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/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-2026-67339.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-2026-67339.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.14.2-1"
}
]
}
],
"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",
"7.9.2-0.1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-67339.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-09T09:47:22.283474035Z",
"provider": "osv",
"upstream": [
"CVE-2026-67339"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-67339"
]
},
"related_cves": [
{
"value": "CVE-2026-67339",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 111409,
"published_at": "2026-08-01T13:17:04.99+00:00"
}