ubuntu-cve-2026-14741
Vulnerability from osv_ubuntu
Published
2026-07-10 00:00
Modified
2026-07-29 07:53
Summary
Details
HTTP::Date versions before 6.08 for Perl allow CPU exhaustion via polynomial regex backtracking in parse_date. parse_date() matches the date string against a chain of alternative regexes, and str2time() delegates to it. Several of these patterns place unbounded quantifiers next to each other before a trailing \s*$ anchor. A valid date prefix followed by a long interior run of digits, letters, or whitespace and a single trailing byte that defeats the final match forces the engine to repartition the run, giving polynomial (about quadratic) backtracking. A header value of a few tens of kilobytes runs for tens of seconds of CPU. HTTP::Date parses timestamps such as HTTP Date, Expires, and Last-Modified headers, which commonly originate from untrusted sources. Any caller that passes an untrusted date header to str2time() or parse_date() can be driven to consume unbounded CPU, a denial of service.
Severity
7.5 (High)
N/A (UNKNOWN)
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libhttp-date-perl",
"binary_version": "6.02-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:14.04:LTS",
"name": "libhttp-date-perl",
"purl": "pkg:deb/ubuntu/libhttp-date-perl@6.02-1?arch=source\u0026distro=trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6.02-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libhttp-date-perl",
"binary_version": "6.02-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "libhttp-date-perl",
"purl": "pkg:deb/ubuntu/libhttp-date-perl@6.02-1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6.02-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libhttp-date-perl",
"binary_version": "6.02-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "libhttp-date-perl",
"purl": "pkg:deb/ubuntu/libhttp-date-perl@6.02-1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6.02-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libhttp-date-perl",
"binary_version": "6.05-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "libhttp-date-perl",
"purl": "pkg:deb/ubuntu/libhttp-date-perl@6.05-1?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6.02-1",
"6.05-1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libhttp-date-perl",
"binary_version": "6.05-1ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "libhttp-date-perl",
"purl": "pkg:deb/ubuntu/libhttp-date-perl@6.05-1ubuntu0.1?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "6.05-1ubuntu0.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6.05-1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libhttp-date-perl",
"binary_version": "6.06-1ubuntu0.24.04.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "libhttp-date-perl",
"purl": "pkg:deb/ubuntu/libhttp-date-perl@6.06-1ubuntu0.24.04.1?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "6.06-1ubuntu0.24.04.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6.05-2",
"6.06-1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libhttp-date-perl",
"binary_version": "6.06-1ubuntu0.26.04.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "libhttp-date-perl",
"purl": "pkg:deb/ubuntu/libhttp-date-perl@6.06-1ubuntu0.26.04.1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "6.06-1ubuntu0.26.04.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6.06-1"
]
}
],
"aliases": [],
"details": "HTTP::Date versions before 6.08 for Perl allow CPU exhaustion via polynomial regex backtracking in parse_date. parse_date() matches the date string against a chain of alternative regexes, and str2time() delegates to it. Several of these patterns place unbounded quantifiers next to each other before a trailing `\\s*$` anchor. A valid date prefix followed by a long interior run of digits, letters, or whitespace and a single trailing byte that defeats the final match forces the engine to repartition the run, giving polynomial (about quadratic) backtracking. A header value of a few tens of kilobytes runs for tens of seconds of CPU. HTTP::Date parses timestamps such as HTTP `Date`, `Expires`, and `Last-Modified` headers, which commonly originate from untrusted sources. Any caller that passes an untrusted date header to str2time() or parse_date() can be driven to consume unbounded CPU, a denial of service.",
"id": "UBUNTU-CVE-2026-14741",
"modified": "2026-07-29T07:53:22Z",
"published": "2026-07-10T00:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-14741"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-14741"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8599-1"
}
],
"related": [
"USN-8599-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-14741"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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