UnratedFix available
libyaml-perl — security advisory
backtracking leading to exponential load time
- Products
- libyaml-perl
- Affected versions
- 1.13-1, 1.15-1, 1.21-1, 1.24-1, 1.29-1, 1.30-1, 1.30-2, 1.31-1
- Fixed versions
- 1.15-1ubuntu0.1~esm1, 1.24-1ubuntu0.1~esm1, 1.30-1ubuntu0.20.04.1~esm1, 1.30-1ubuntu0.22.04.1, 1.31-1ubuntu0.24.04.1, 1.31-1ubuntu0.26.04.1~esm1
- CVEs
- CVE-2026-63676
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:12 UTC · Revision 1
Source evidence
backtracking leading to exponential load time
osv:UBUNTU-CVE-2026-63676
libyaml-perl
Fixed versions: 1.15-1ubuntu0.1~esm1
libyaml-perl
Fixed versions: 1.24-1ubuntu0.1~esm1
libyaml-perl
Fixed versions: 1.30-1ubuntu0.20.04.1~esm1
libyaml-perl
Fixed versions: 1.30-1ubuntu0.22.04.1
libyaml-perl
Fixed versions: 1.31-1ubuntu0.24.04.1
libyaml-perl
Fixed versions: Not specified
libyaml-perl
Fixed versions: 1.31-1ubuntu0.26.04.1~esm1
Complete source record
{
"id": "4c20554bcb737d942a913283d14c596a0f12c324501e520e2e51961807f4f1b8",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-63676",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-63676",
"summary": "backtracking leading to exponential load time",
"evidence": "osv:UBUNTU-CVE-2026-63676",
"products": [
{
"name": {
"value": "libyaml-perl",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.15-1ubuntu0.1~esm1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": [
{
"value": "1.13-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.15-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "libyaml-perl",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.24-1ubuntu0.1~esm1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": [
{
"value": "1.21-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.24-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "libyaml-perl",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.30-1ubuntu0.20.04.1~esm1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "1.29-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.30-1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "libyaml-perl",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.30-1ubuntu0.22.04.1",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": [
{
"value": "1.30-1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "libyaml-perl",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.31-1ubuntu0.24.04.1",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": [
{
"value": "1.30-2",
"evidence": "/affected/4/versions"
},
{
"value": "1.31-1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "libyaml-perl",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.31-1",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "libyaml-perl",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.31-1ubuntu0.26.04.1~esm1",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": [
{
"value": "1.31-1",
"evidence": "/affected/6/versions"
}
]
}
],
"severity": "unknown",
"structured": {
"id": "UBUNTU-CVE-2026-63676",
"aliases": [
"UBUNTU-CVE-2026-63676"
],
"metrics": [
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.15-1ubuntu0.1~esm1"
}
]
}
],
"package": {
"name": "libyaml-perl",
"purl": "pkg:deb/ubuntu/libyaml-perl?arch=source&distro=esm-infra-legacy%2Fxenial",
"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
"1.13-1",
"1.15-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63676.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libyaml-perl",
"binary_version": "1.15-1ubuntu0.1~esm1"
}
],
"availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.24-1ubuntu0.1~esm1"
}
]
}
],
"package": {
"name": "libyaml-perl",
"purl": "pkg:deb/ubuntu/libyaml-perl?arch=source&distro=esm-infra%2Fbionic",
"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"versions": [
"1.21-1",
"1.24-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63676.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libyaml-perl",
"binary_version": "1.24-1ubuntu0.1~esm1"
}
],
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.30-1ubuntu0.20.04.1~esm1"
}
]
}
],
"package": {
"name": "libyaml-perl",
"purl": "pkg:deb/ubuntu/libyaml-perl?arch=source&distro=esm-infra%2Ffocal",
"ecosystem": "Ubuntu:Pro:20.04:LTS"
},
"versions": [
"1.29-1",
"1.30-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63676.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libyaml-perl",
"binary_version": "1.30-1ubuntu0.20.04.1~esm1"
}
],
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.30-1ubuntu0.22.04.1"
}
]
}
],
"package": {
"name": "libyaml-perl",
"purl": "pkg:deb/ubuntu/libyaml-perl?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"1.30-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63676.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libyaml-perl",
"binary_version": "1.30-1ubuntu0.22.04.1"
}
],
"availability": "No subscription required"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.31-1ubuntu0.24.04.1"
}
]
}
],
"package": {
"name": "libyaml-perl",
"purl": "pkg:deb/ubuntu/libyaml-perl?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"1.30-2",
"1.31-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63676.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libyaml-perl",
"binary_version": "1.31-1ubuntu0.24.04.1"
}
],
"availability": "No subscription required"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libyaml-perl",
"purl": "pkg:deb/ubuntu/libyaml-perl?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"1.31-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63676.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libyaml-perl",
"binary_version": "1.31-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.31-1ubuntu0.26.04.1~esm1"
}
]
}
],
"package": {
"name": "libyaml-perl",
"purl": "pkg:deb/ubuntu/libyaml-perl?arch=source&distro=esm-apps%2Fresolute",
"ecosystem": "Ubuntu:Pro:26.04:LTS"
},
"versions": [
"1.31-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63676.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libyaml-perl",
"binary_version": "1.31-1ubuntu0.26.04.1~esm1"
}
],
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}
}
],
"modified": "2026-10-17T13:00:32.502623293Z",
"provider": "osv",
"upstream": [
"CVE-2026-63676"
],
"references": [
"https://ubuntu.com/security/CVE-2026-63676",
"https://www.cve.org/CVERecord?id=CVE-2026-63676",
"https://ubuntu.com/security/notices/USN-8925-1"
]
},
"related_cves": [
{
"value": "CVE-2026-63676",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 360682,
"published_at": "2026-08-27T00:00:00+00:00"
}