usn-8736-1
Vulnerability from osv_ubuntu
Published
2026-09-08 14:25
Modified
2026-09-08 14:25
Summary
perl vulnerabilities
Details
It was discovered that Perl incorrectly handled certain large inputs during regular expression matching. An attacker could possibly use this issue to trigger out-of-bounds heap reads or writes, resulting in a denial of service or arbitrary code execution. (CVE-2026-15534)
It was discovered that Perl incorrectly handled certain regular expression containing alternative matching branches. An attacker could possibly use this issue to cause incorrect regular expression matches, resulting in security restrictions being bypassed. (CVE-2026-19487)
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-15534",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-19487",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:14.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libcgi-fast-perl",
"binary_version": "5.18.2-2ubuntu1.7+esm9"
},
{
"binary_name": "libperl5.18",
"binary_version": "5.18.2-2ubuntu1.7+esm9"
},
{
"binary_name": "perl",
"binary_version": "5.18.2-2ubuntu1.7+esm9"
},
{
"binary_name": "perl-base",
"binary_version": "5.18.2-2ubuntu1.7+esm9"
},
{
"binary_name": "perl-debug",
"binary_version": "5.18.2-2ubuntu1.7+esm9"
},
{
"binary_name": "perl-modules",
"binary_version": "5.18.2-2ubuntu1.7+esm9"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "perl",
"purl": "pkg:deb/ubuntu/perl@5.18.2-2ubuntu1.7+esm9?arch=source\u0026distro=esm-infra-legacy/trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.18.2-2ubuntu1.7+esm9"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.14.2-21build1",
"5.18.1-4",
"5.18.1-4build1",
"5.18.1-5",
"5.18.2-2",
"5.18.2-2ubuntu1",
"5.18.2-2ubuntu1.1",
"5.18.2-2ubuntu1.3",
"5.18.2-2ubuntu1.4",
"5.18.2-2ubuntu1.6",
"5.18.2-2ubuntu1.7",
"5.18.2-2ubuntu1.7+esm3",
"5.18.2-2ubuntu1.7+esm4",
"5.18.2-2ubuntu1.7+esm5",
"5.18.2-2ubuntu1.7+esm7",
"5.18.2-2ubuntu1.7+esm8"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-15534",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-19487",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:16.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libperl5.22",
"binary_version": "5.22.1-9ubuntu0.9+esm4"
},
{
"binary_name": "perl",
"binary_version": "5.22.1-9ubuntu0.9+esm4"
},
{
"binary_name": "perl-base",
"binary_version": "5.22.1-9ubuntu0.9+esm4"
},
{
"binary_name": "perl-debug",
"binary_version": "5.22.1-9ubuntu0.9+esm4"
},
{
"binary_name": "perl-modules-5.22",
"binary_version": "5.22.1-9ubuntu0.9+esm4"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "perl",
"purl": "pkg:deb/ubuntu/perl@5.22.1-9ubuntu0.9+esm4?arch=source\u0026distro=esm-infra-legacy/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.22.1-9ubuntu0.9+esm4"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.20.2-6",
"5.22.1-3",
"5.22.1-4",
"5.22.1-5",
"5.22.1-7",
"5.22.1-8",
"5.22.1-9",
"5.22.1-9ubuntu0.2",
"5.22.1-9ubuntu0.3",
"5.22.1-9ubuntu0.5",
"5.22.1-9ubuntu0.6",
"5.22.1-9ubuntu0.9",
"5.22.1-9ubuntu0.9+esm1",
"5.22.1-9ubuntu0.9+esm2",
"5.22.1-9ubuntu0.9+esm3"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-15534",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-19487",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:18.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libperl5.26",
"binary_version": "5.26.1-6ubuntu0.7+esm4"
},
{
"binary_name": "perl",
"binary_version": "5.26.1-6ubuntu0.7+esm4"
},
{
"binary_name": "perl-base",
"binary_version": "5.26.1-6ubuntu0.7+esm4"
},
{
"binary_name": "perl-debug",
"binary_version": "5.26.1-6ubuntu0.7+esm4"
},
{
"binary_name": "perl-modules-5.26",
"binary_version": "5.26.1-6ubuntu0.7+esm4"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "perl",
"purl": "pkg:deb/ubuntu/perl@5.26.1-6ubuntu0.7+esm4?arch=source\u0026distro=esm-infra/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.26.1-6ubuntu0.7+esm4"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.26.0-8ubuntu1",
"5.26.1-2ubuntu1",
"5.26.1-3",
"5.26.1-4",
"5.26.1-4build1",
"5.26.1-5",
"5.26.1-6",
"5.26.1-6ubuntu0.1",
"5.26.1-6ubuntu0.2",
"5.26.1-6ubuntu0.3",
"5.26.1-6ubuntu0.5",
"5.26.1-6ubuntu0.6",
"5.26.1-6ubuntu0.7",
"5.26.1-6ubuntu0.7+esm2",
"5.26.1-6ubuntu0.7+esm3"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-15534",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-19487",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:20.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libperl5.30",
"binary_version": "5.30.0-9ubuntu0.5+esm4"
},
{
"binary_name": "perl",
"binary_version": "5.30.0-9ubuntu0.5+esm4"
},
{
"binary_name": "perl-base",
"binary_version": "5.30.0-9ubuntu0.5+esm4"
},
{
"binary_name": "perl-debug",
"binary_version": "5.30.0-9ubuntu0.5+esm4"
},
{
"binary_name": "perl-modules-5.30",
"binary_version": "5.30.0-9ubuntu0.5+esm4"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "perl",
"purl": "pkg:deb/ubuntu/perl@5.30.0-9ubuntu0.5+esm4?arch=source\u0026distro=esm-infra/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.30.0-9ubuntu0.5+esm4"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.28.1-6build1",
"5.30.0-7",
"5.30.0-9",
"5.30.0-9build1",
"5.30.0-9ubuntu0.2",
"5.30.0-9ubuntu0.3",
"5.30.0-9ubuntu0.4",
"5.30.0-9ubuntu0.5",
"5.30.0-9ubuntu0.5+esm2",
"5.30.0-9ubuntu0.5+esm3"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-15534",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-19487",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:22.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libperl5.34",
"binary_version": "5.34.0-3ubuntu1.9"
},
{
"binary_name": "perl",
"binary_version": "5.34.0-3ubuntu1.9"
},
{
"binary_name": "perl-base",
"binary_version": "5.34.0-3ubuntu1.9"
},
{
"binary_name": "perl-debug",
"binary_version": "5.34.0-3ubuntu1.9"
},
{
"binary_name": "perl-modules-5.34",
"binary_version": "5.34.0-3ubuntu1.9"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "perl",
"purl": "pkg:deb/ubuntu/perl@5.34.0-3ubuntu1.9?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.34.0-3ubuntu1.9"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.32.1-3ubuntu3",
"5.34.0-3ubuntu1",
"5.34.0-3ubuntu1.1",
"5.34.0-3ubuntu1.2",
"5.34.0-3ubuntu1.3",
"5.34.0-3ubuntu1.4",
"5.34.0-3ubuntu1.5",
"5.34.0-3ubuntu1.7",
"5.34.0-3ubuntu1.8"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-15534",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-19487",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:26.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libperl5.40",
"binary_version": "5.40.1-7ubuntu0.2"
},
{
"binary_name": "perl",
"binary_version": "5.40.1-7ubuntu0.2"
},
{
"binary_name": "perl-base",
"binary_version": "5.40.1-7ubuntu0.2"
},
{
"binary_name": "perl-debug",
"binary_version": "5.40.1-7ubuntu0.2"
},
{
"binary_name": "perl-modules-5.40",
"binary_version": "5.40.1-7ubuntu0.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "perl",
"purl": "pkg:deb/ubuntu/perl@5.40.1-7ubuntu0.2?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.40.1-7ubuntu0.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.40.1-6build1",
"5.40.1-7build1",
"5.40.1-7ubuntu0.1"
]
}
],
"aliases": [],
"details": "It was discovered that Perl incorrectly handled certain large inputs during\nregular expression matching. An attacker could possibly use this issue to\ntrigger out-of-bounds heap reads or writes, resulting in a denial of\nservice or arbitrary code execution. (CVE-2026-15534)\n\nIt was discovered that Perl incorrectly handled certain regular expression\ncontaining alternative matching branches. An attacker could possibly use\nthis issue to cause incorrect regular expression matches, resulting in\nsecurity restrictions being bypassed. (CVE-2026-19487)",
"id": "USN-8736-1",
"modified": "2026-09-08T14:25:07Z",
"published": "2026-09-08T14:25:07Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8736-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-15534"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-19487"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "perl vulnerabilities",
"upstream": [
"UBUNTU-CVE-2026-15534",
"UBUNTU-CVE-2026-19487"
]
}
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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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