High
node-tar — security advisory
node-tar is a full-featured Tar for Node.js. When using default options in versions 7.5.7 and below, an attacker-controlled archive can create a hardlink inside the extraction directory that points to a file outside the extraction root, enabling arbitrary file read and write as the extracting user. Severity is high because the primitive bypasses path protections and turns archive extraction into a direct filesystem access primitive. This issue has been fixed in version 7.5.8.
- Products
- node-tar
- Affected versions
- 0.1.18-1, 0.1.18-1ubuntu0.1~esm1, 1.0.3-2, 1.0.3-2ubuntu0.1~esm1, 2.2.1-1, 4.4.10+ds1-2, 4.4.10+ds1-2ubuntu1, 4.4.10+ds1-2ubuntu1+esm1, 6.1.11+ds1+~cs6.0.6-1, 6.1.11+~cs11.3.10-1, 6.1.13+~cs7.0.5-1, 6.1.13+~cs7.0.5-3, 6.1.7+~cs11.3.10-1, 6.2.1+ds1+~cs6.1.13-10, 6.2.1+ds1+~cs6.1.13-6, 6.2.1+ds1+~cs6.1.13-7, 6.2.1+~cs7.0.8-1, 7.5.22+~4.0.1-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-26960
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:56 UTC · Revision 1
Source evidence
node-tar is a full-featured Tar for Node.js. When using default options in versions 7.5.7 and below, an attacker-controlled archive can create a hardlink inside the extraction directory that points to a file outside the extraction root, enabling arbitrary file read and write as the extracting user. Severity is high because the primitive bypasses path protections and turns archive extraction into a direct filesystem access primitive. This issue has been fixed in version 7.5.8.
osv:UBUNTU-CVE-2026-26960
node-tar
Fixed versions: Not specified
node-tar
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node-tar
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node-tar
Fixed versions: Not specified
node-tar
Fixed versions: Not specified
node-tar
Fixed versions: Not specified
node-tar
Fixed versions: Not specified
node-tar
Fixed versions: Not specified
node-tar
Fixed versions: Not specified
Complete source record
{
"id": "64c2cc88675df4a055b371baf6770d3b63e0939a362ec8d0b7953076cb212576",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-26960",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-26960",
"summary": "node-tar is a full-featured Tar for Node.js. When using default options in versions 7.5.7 and below, an attacker-controlled archive can create a hardlink inside the extraction directory that points to a file outside the extraction root, enabling arbitrary file read and write as the extracting user. Severity is high because the primitive bypasses path protections and turns archive extraction into a direct filesystem access primitive. This issue has been fixed in version 7.5.8.",
"evidence": "osv:UBUNTU-CVE-2026-26960",
"products": [
{
"name": {
"value": "node-tar",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.1.18-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.1.18-1ubuntu0.1~esm1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "node-tar",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.0.3-2",
"evidence": "/affected/1/versions"
},
{
"value": "1.0.3-2ubuntu0.1~esm1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "node-tar",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.2.1-1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
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"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.4.10+ds1-2",
"evidence": "/affected/3/versions"
},
{
"value": "4.4.10+ds1-2ubuntu1",
"evidence": "/affected/3/versions"
},
{
"value": "4.4.10+ds1-2ubuntu1+esm1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
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"evidence": "/affected/4/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "6.1.7+~cs11.3.10-1",
"evidence": "/affected/4/versions"
},
{
"value": "6.1.11+~cs11.3.10-1",
"evidence": "/affected/4/versions"
},
{
"value": "6.1.11+ds1+~cs6.0.6-1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "node-tar",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "6.1.13+~cs7.0.5-1",
"evidence": "/affected/5/versions"
},
{
"value": "6.1.13+~cs7.0.5-3",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "node-tar",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "6.2.1+~cs7.0.8-1",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "node-tar",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "6.2.1+ds1+~cs6.1.13-10",
"evidence": "/affected/7/versions"
},
{
"value": "7.5.22+~4.0.1-1",
"evidence": "/affected/7/versions"
}
]
},
{
"name": {
"value": "node-tar",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "6.2.1+~cs7.0.8-1",
"evidence": "/affected/8/versions"
},
{
"value": "6.2.1+ds1+~cs6.1.13-6",
"evidence": "/affected/8/versions"
},
{
"value": "6.2.1+ds1+~cs6.1.13-7",
"evidence": "/affected/8/versions"
},
{
"value": "6.2.1+ds1+~cs6.1.13-10",
"evidence": "/affected/8/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-26960",
"aliases": [
"UBUNTU-CVE-2026-26960"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "node-tar",
"purl": "pkg:deb/ubuntu/node-tar?arch=source&distro=esm-infra-legacy%2Ftrusty",
"ecosystem": "Ubuntu:Pro:14.04:LTS"
},
"versions": [
"0.1.18-1",
"0.1.18-1ubuntu0.1~esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26960.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-tar",
"binary_version": "0.1.18-1ubuntu0.1~esm1"
}
]
}
},
{
"ranges": [
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"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
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}
],
"package": {
"name": "node-tar",
"purl": "pkg:deb/ubuntu/node-tar?arch=source&distro=esm-apps%2Fxenial",
"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
"1.0.3-2",
"1.0.3-2ubuntu0.1~esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26960.json"
},
"ecosystem_specific": {
"binaries": [
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"binary_version": "1.0.3-2ubuntu0.1~esm1"
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},
{
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"type": "ECOSYSTEM",
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],
"package": {
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"purl": "pkg:deb/ubuntu/node-tar?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"2.2.1-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26960.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-tar",
"binary_version": "2.2.1-1"
}
]
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{
"ranges": [
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"package": {
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"ecosystem": "Ubuntu:Pro:20.04:LTS"
},
"versions": [
"4.4.10+ds1-2",
"4.4.10+ds1-2ubuntu1",
"4.4.10+ds1-2ubuntu1+esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26960.json"
},
"ecosystem_specific": {
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}
]
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],
"package": {
"name": "node-tar",
"purl": "pkg:deb/ubuntu/node-tar?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"6.1.7+~cs11.3.10-1",
"6.1.11+~cs11.3.10-1",
"6.1.11+ds1+~cs6.0.6-1"
],
"database_specific": {
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},
"ecosystem_specific": {
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"package": {
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},
"versions": [
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"6.1.13+~cs7.0.5-3"
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},
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"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
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"6.2.1+ds1+~cs6.1.13-6",
"6.2.1+ds1+~cs6.1.13-7",
"6.2.1+ds1+~cs6.1.13-10"
],
"database_specific": {
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},
"ecosystem_specific": {
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{
"binary_name": "node-tar",
"binary_version": "6.2.1+ds1+~cs6.1.13-10"
}
]
}
}
],
"modified": "2026-10-17T12:56:18.254448684Z",
"provider": "osv",
"upstream": [
"CVE-2026-26960"
],
"references": [
"https://ubuntu.com/security/CVE-2026-26960",
"https://www.cve.org/CVERecord?id=CVE-2026-26960",
"https://github.com/isaacs/node-tar/security/advisories/GHSA-83g3-92jg-28cx",
"https://github.com/isaacs/node-tar/commit/2cb1120bcefe28d7ecc719b41441ade59c52e384",
"https://github.com/isaacs/node-tar/commit/d18e4e1f846f4ddddc153b0f536a19c050e7499f"
]
},
"related_cves": [
{
"value": "CVE-2026-26960",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 355185,
"published_at": "2026-02-20T02:16:00+00:00"
}