MediumFix available
libwww-perl — security advisory
LWP::UserAgent versions before 6.83 for Perl leak Authorization and Proxy-Authorization headers on cross-origin redirects. On a 3xx response, the redirect handler strips only Host and Cookie before issuing the follow-up request. Caller-supplied Authorization and Proxy-Authorization headers are sent unchanged to the redirect target, including across scheme, host, or port changes. A redirect to an attacker controlled host therefore discloses the caller's credentials to that host.
- Products
- libwww-perl
- Affected versions
- 6.68-1, 6.70-1, 6.71-1, 6.71-2, 6.72-1, 6.73-1, 6.76-1, 6.77-1, 6.78-1, 6.80-1, 6.81-1, 6.82-1, 6.83-1
- Fixed versions
- 6.83-1
- CVEs
- CVE-2026-8368
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 17:48 UTC · Revision 2
Source evidence
LWP::UserAgent versions before 6.83 for Perl leak Authorization and Proxy-Authorization headers on cross-origin redirects. On a 3xx response, the redirect handler strips only Host and Cookie before issuing the follow-up request. Caller-supplied Authorization and Proxy-Authorization headers are sent unchanged to the redirect target, including across scheme, host, or port changes. A redirect to an attacker controlled host therefore discloses the caller's credentials to that host.
osv:DEBIAN-CVE-2026-8368
libwww-perl
Fixed versions: Not specified
libwww-perl
Fixed versions: Not specified
libwww-perl
Fixed versions: 6.83-1
Complete source record
{
"id": "c955c72403f579ed65393ff98e5af470dc24b68c63951424de311e3946cd49b7",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-8368",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-8368",
"summary": "LWP::UserAgent versions before 6.83 for Perl leak Authorization and Proxy-Authorization headers on cross-origin redirects. On a 3xx response, the redirect handler strips only Host and Cookie before issuing the follow-up request. Caller-supplied Authorization and Proxy-Authorization headers are sent unchanged to the redirect target, including across scheme, host, or port changes. A redirect to an attacker controlled host therefore discloses the caller's credentials to that host.",
"evidence": "osv:DEBIAN-CVE-2026-8368",
"products": [
{
"name": {
"value": "libwww-perl",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "6.68-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.70-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.71-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.71-2",
"evidence": "/affected/0/versions"
},
{
"value": "6.72-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.73-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.76-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.77-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.78-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.80-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.81-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.82-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.83-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "libwww-perl",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "6.78-1",
"evidence": "/affected/1/versions"
},
{
"value": "6.80-1",
"evidence": "/affected/1/versions"
},
{
"value": "6.81-1",
"evidence": "/affected/1/versions"
},
{
"value": "6.82-1",
"evidence": "/affected/1/versions"
},
{
"value": "6.83-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "libwww-perl",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "6.83-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "6.78-1",
"evidence": "/affected/2/versions"
},
{
"value": "6.80-1",
"evidence": "/affected/2/versions"
},
{
"value": "6.81-1",
"evidence": "/affected/2/versions"
},
{
"value": "6.82-1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-8368",
"aliases": [
"DEBIAN-CVE-2026-8368"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libwww-perl",
"purl": "pkg:deb/debian/libwww-perl?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"6.68-1",
"6.70-1",
"6.71-1",
"6.71-2",
"6.72-1",
"6.73-1",
"6.76-1",
"6.77-1",
"6.78-1",
"6.80-1",
"6.81-1",
"6.82-1",
"6.83-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-8368.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libwww-perl",
"purl": "pkg:deb/debian/libwww-perl?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"6.78-1",
"6.80-1",
"6.81-1",
"6.82-1",
"6.83-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-8368.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "6.83-1"
}
]
}
],
"package": {
"name": "libwww-perl",
"purl": "pkg:deb/debian/libwww-perl?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"6.78-1",
"6.80-1",
"6.81-1",
"6.82-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-8368.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-27T09:47:36.071757716Z",
"provider": "osv",
"upstream": [
"CVE-2026-8368"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-8368"
]
},
"related_cves": [
{
"value": "CVE-2026-8368",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 461272,
"published_at": "2026-05-12T15:16:19.69+00:00"
}