UnratedFix available
libyaml-perl vulnerabilities
Type: advisorySources: OSV
Dominique Dumont discovered that YAML-LibYAML did not correctly handle certain reflection operations. If a user or system were tricked into opening a specially crafted file, an attacker could possibly use this issue to delete files. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2017-20285) It was discovered that YAML-LibYAML did not correctly handle parsing certain documents. If a user or automated system were tricked into opening a specially crafted file, an attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2019-25777) It was discovered that YAML-LibYAML contained a regular expression susceptible to catastrophic backtracking. If a user or automated system were tricked into opening a specially crafted file, an attacker could possibly use this issue to cause a denial of service. (CVE-2026-63676)
- 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-2017-20285, CVE-2019-25777, CVE-2026-63676
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 12:13 UTC · Revision 1
Source evidence
Dominique Dumont discovered that YAML-LibYAML did not correctly handle certain reflection operations. If a user or system were tricked into opening a specially crafted file, an attacker could possibly use this issue to delete files. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2017-20285) It was discovered that YAML-LibYAML did not correctly handle parsing certain documents. If a user or automated system were tricked into opening a specially crafted file, an attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2019-25777) It was discovered that YAML-LibYAML contained a regular expression susceptible to catastrophic backtracking. If a user or automated system were tricked into opening a specially crafted file, an attacker could possibly use this issue to cause a denial of service. (CVE-2026-63676)
osv:USN-8925-1
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: 1.31-1ubuntu0.26.04.1~esm1
Complete source record
{
"id": "58e0b7ddda2b3bc23a96a851f32dd873408f528fe70e08b6c5d308cf96464ac1",
"url": "https://osv.dev/vulnerability/USN-8925-1",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "libyaml-perl vulnerabilities",
"summary": "Dominique Dumont discovered that YAML-LibYAML did not correctly handle certain reflection operations. If a user or system were tricked into opening a specially crafted file, an attacker could possibly use this issue to delete files. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2017-20285) It was discovered that YAML-LibYAML did not correctly handle parsing certain documents. If a user or automated system were tricked into opening a specially crafted file, an attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2019-25777) It was discovered that YAML-LibYAML contained a regular expression susceptible to catastrophic backtracking. If a user or automated system were tricked into opening a specially crafted file, an attacker could possibly use this issue to cause a denial of service. (CVE-2026-63676)",
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"severity": "unknown",
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]
}
],
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},
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"1.21-1",
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],
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},
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"binaries": [
{
"binary_name": "libyaml-perl",
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}
],
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}
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"package": {
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],
"package": {
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"package": {
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},
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],
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}
}
],
"modified": "2026-10-14T11:57:58.298079668Z",
"provider": "osv",
"upstream": [
"CVE-2017-20285",
"CVE-2019-25777",
"CVE-2026-63676",
"UBUNTU-CVE-2017-20285",
"UBUNTU-CVE-2019-25777",
"UBUNTU-CVE-2026-63676"
],
"references": [
"https://ubuntu.com/security/notices/USN-8925-1",
"https://ubuntu.com/security/CVE-2017-20285",
"https://ubuntu.com/security/CVE-2019-25777",
"https://ubuntu.com/security/CVE-2026-63676"
]
},
"related_cves": [
{
"value": "CVE-2017-20285",
"evidence": "/upstream"
},
{
"value": "CVE-2019-25777",
"evidence": "/upstream"
},
{
"value": "CVE-2026-63676",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 316294,
"published_at": "2026-10-14T03:31:33+00:00"
}