ubuntu-cve-2026-8450
Vulnerability from osv_ubuntu
Published
2026-05-27 05:16
Modified
2026-06-30 16:18
Summary
Details
HTTP::Daemon versions before 6.17 for Perl allow OS command injection via send_file(). send_file() opens its string argument with Perl's 2-arg open(). The 2-arg form interprets magic prefixes: '| cmd' and 'cmd |' open a pipe to a subprocess, '> path' and '>> path' open the path for write or append. Untrusted input passed to send_file() can run OS commands at the daemon process UID. The read-pipe form ('cmd |') also leaks subprocess stdout into the HTTP response body. The write-mode forms can create or truncate files at attacker chosen paths.
Severity
9.1 (Critical)
8.1 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libhttp-daemon-perl",
"binary_version": "6.01-1ubuntu0.14.04~esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "libhttp-daemon-perl",
"purl": "pkg:deb/ubuntu/libhttp-daemon-perl@6.01-1ubuntu0.14.04~esm2?arch=source\u0026distro=esm-infra-legacy/trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "6.01-1ubuntu0.14.04~esm2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6.01-1",
"6.01-1ubuntu0.14.04~esm1"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libhttp-daemon-perl",
"binary_version": "6.01-1ubuntu0.16.04~esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "libhttp-daemon-perl",
"purl": "pkg:deb/ubuntu/libhttp-daemon-perl@6.01-1ubuntu0.16.04~esm2?arch=source\u0026distro=esm-infra-legacy/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "6.01-1ubuntu0.16.04~esm2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6.01-1",
"6.01-1ubuntu0.16.04~esm1"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libhttp-daemon-perl",
"binary_version": "6.01-1ubuntu0.1+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "libhttp-daemon-perl",
"purl": "pkg:deb/ubuntu/libhttp-daemon-perl@6.01-1ubuntu0.1+esm1?arch=source\u0026distro=esm-infra/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "6.01-1ubuntu0.1+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6.01-1",
"6.01-1ubuntu0.1"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libhttp-daemon-perl",
"binary_version": "6.06-1ubuntu0.1+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "libhttp-daemon-perl",
"purl": "pkg:deb/ubuntu/libhttp-daemon-perl@6.06-1ubuntu0.1+esm1?arch=source\u0026distro=esm-infra/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "6.06-1ubuntu0.1+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6.04-1",
"6.06-1",
"6.06-1ubuntu0.1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libhttp-daemon-perl",
"binary_version": "6.13-1ubuntu0.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "libhttp-daemon-perl",
"purl": "pkg:deb/ubuntu/libhttp-daemon-perl@6.13-1ubuntu0.2?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "6.13-1ubuntu0.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6.12-1",
"6.13-1",
"6.13-1ubuntu0.1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libhttp-daemon-perl",
"binary_version": "6.16-1ubuntu0.24.04.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "libhttp-daemon-perl",
"purl": "pkg:deb/ubuntu/libhttp-daemon-perl@6.16-1ubuntu0.24.04.1?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "6.16-1ubuntu0.24.04.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6.16-1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libhttp-daemon-perl",
"binary_version": "6.16-1ubuntu0.25.10.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "libhttp-daemon-perl",
"purl": "pkg:deb/ubuntu/libhttp-daemon-perl@6.16-1ubuntu0.25.10.1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "6.16-1ubuntu0.25.10.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6.16-1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libhttp-daemon-perl",
"binary_version": "6.16-1ubuntu0.26.04.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "libhttp-daemon-perl",
"purl": "pkg:deb/ubuntu/libhttp-daemon-perl@6.16-1ubuntu0.26.04.1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "6.16-1ubuntu0.26.04.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6.16-1"
]
}
],
"aliases": [],
"details": "HTTP::Daemon versions before 6.17 for Perl allow OS command injection via send_file(). send_file() opens its string argument with Perl\u0027s 2-arg open(). The 2-arg form interprets magic prefixes: \u0027| cmd\u0027 and \u0027cmd |\u0027 open a pipe to a subprocess, \u0027\u003e path\u0027 and \u0027\u003e\u003e path\u0027 open the path for write or append. Untrusted input passed to send_file() can run OS commands at the daemon process UID. The read-pipe form (\u0027cmd |\u0027) also leaks subprocess stdout into the HTTP response body. The write-mode forms can create or truncate files at attacker chosen paths.",
"id": "UBUNTU-CVE-2026-8450",
"modified": "2026-06-30T16:18:40Z",
"published": "2026-05-27T05:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-8450"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8450"
},
{
"type": "REPORT",
"url": "https://lists.security.metacpan.org/cve-announce/msg/40435207/"
},
{
"type": "REPORT",
"url": "https://github.com/libwww-perl/HTTP-Daemon/pull/89"
},
{
"type": "REPORT",
"url": "https://metacpan.org/release/OALDERS/HTTP-Daemon-6.17/changes"
},
{
"type": "REPORT",
"url": "http://www.openwall.com/lists/oss-security/2026/05/27/5"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8419-1"
}
],
"related": [
"USN-8419-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-8450"
]
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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