node-tar — security advisory
node-tar is a full-featured Tar for Node.js. Prior to 7.5.16, tar (node-tar) applies a PAX extended header's size= record (and other PAX overrides) to the next header entry of any type, including intermediary metadata headers such as a GNU long-name (L) or long-link (K) entry. Per POSIX pax, a PAX extended header (x) describes the next file entry, not the intermediary extension headers that may sit between the x header and the file it annotates. Because node-tar lets the PAX size override the byte length of an intervening L/K/x header, an attacker can desynchronize node-tar's stream cursor relative to every other mainstream tar implementation (GNU tar, libarchive/bsdtar, Python tarfile, and the now-fixed tar-rs / astral-tokio-tar). The result is a tar parser interpretation differential (CWE-436): a single crafted archive yields a different set of members under node-tar than under the reference tar tools. An attacker can use this to hide a member from one parser while it is visible to another, which defeats security tooling whose scanner and extractor disagree on archive contents (e.g. a malware/secret scanner that lists entries with one library while a downstream step extracts with another) This vulnerability is fixed in 7.5.16.
- Products
- node-tar
- Affected versions
- 6.1.13+~cs7.0.5-1, 6.1.13+~cs7.0.5-1+deb12u1, 6.1.13+~cs7.0.5-2, 6.1.13+~cs7.0.5-3, 6.1.13+~cs7.0.5-4, 6.2.1+ds1+~cs6.1.13-1, 6.2.1+ds1+~cs6.1.13-10, 6.2.1+ds1+~cs6.1.13-11, 6.2.1+ds1+~cs6.1.13-2, 6.2.1+ds1+~cs6.1.13-3, 6.2.1+ds1+~cs6.1.13-4, 6.2.1+ds1+~cs6.1.13-5, 6.2.1+ds1+~cs6.1.13-6, 6.2.1+ds1+~cs6.1.13-7, 6.2.1+ds1+~cs6.1.13-8, 6.2.1+ds1+~cs6.1.13-9, 6.2.1+~cs7.0.8-1, 6.2.1+~cs7.0.8-1+deb13u1, 7.5.16+~4.0.1-1, 7.5.16+~4.0.1-2, 7.5.19+~4.0.1-1, 7.5.19+~4.0.1-2, 7.5.22+~4.0.1-1
- Fixed versions
- 7.5.16+~4.0.1-2
- CVEs
- CVE-2026-53655
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 12:16 UTC · Revision 2
Source evidence
node-tar is a full-featured Tar for Node.js. Prior to 7.5.16, tar (node-tar) applies a PAX extended header's size= record (and other PAX overrides) to the next header entry of any type, including intermediary metadata headers such as a GNU long-name (L) or long-link (K) entry. Per POSIX pax, a PAX extended header (x) describes the next file entry, not the intermediary extension headers that may sit between the x header and the file it annotates. Because node-tar lets the PAX size override the byte length of an intervening L/K/x header, an attacker can desynchronize node-tar's stream cursor relative to every other mainstream tar implementation (GNU tar, libarchive/bsdtar, Python tarfile, and the now-fixed tar-rs / astral-tokio-tar). The result is a tar parser interpretation differential (CWE-436): a single crafted archive yields a different set of members under node-tar than under the reference tar tools. An attacker can use this to hide a member from one parser while it is visible to another, which defeats security tooling whose scanner and extractor disagree on archive contents (e.g. a malware/secret scanner that lists entries with one library while a downstream step extracts with another) This vulnerability is fixed in 7.5.16.
osv:DEBIAN-CVE-2026-53655
node-tar
Fixed versions: Not specified
node-tar
Fixed versions: Not specified
node-tar
Fixed versions: 7.5.16+~4.0.1-2
Complete source record
{
"id": "24245742725b0d633b97df61a11799b758e127567366714aab4ded4f0c367f1e",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-53655",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-53655",
"summary": "node-tar is a full-featured Tar for Node.js. Prior to 7.5.16, tar (node-tar) applies a PAX extended header's size= record (and other PAX overrides) to the next header entry of any type, including intermediary metadata headers such as a GNU long-name (L) or long-link (K) entry. Per POSIX pax, a PAX extended header (x) describes the next file entry, not the intermediary extension headers that may sit between the x header and the file it annotates. Because node-tar lets the PAX size override the byte length of an intervening L/K/x header, an attacker can desynchronize node-tar's stream cursor relative to every other mainstream tar implementation (GNU tar, libarchive/bsdtar, Python tarfile, and the now-fixed tar-rs / astral-tokio-tar). The result is a tar parser interpretation differential (CWE-436): a single crafted archive yields a different set of members under node-tar than under the reference tar tools. An attacker can use this to hide a member from one parser while it is visible to another, which defeats security tooling whose scanner and extractor disagree on archive contents (e.g. a malware/secret scanner that lists entries with one library while a downstream step extracts with another) This vulnerability is fixed in 7.5.16.",
"evidence": "osv:DEBIAN-CVE-2026-53655",
"products": [
{
"name": {
"value": "node-tar",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "6.1.13+~cs7.0.5-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.1.13+~cs7.0.5-1+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "6.1.13+~cs7.0.5-2",
"evidence": "/affected/0/versions"
},
{
"value": "6.1.13+~cs7.0.5-3",
"evidence": "/affected/0/versions"
},
{
"value": "6.1.13+~cs7.0.5-4",
"evidence": "/affected/0/versions"
},
{
"value": "6.2.1+ds1+~cs6.1.13-1",
"evidence": "/affected/0/versions"
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{
"value": "6.2.1+ds1+~cs6.1.13-10",
"evidence": "/affected/0/versions"
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{
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"evidence": "/affected/0/versions"
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{
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"evidence": "/affected/0/versions"
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{
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"evidence": "/affected/0/versions"
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{
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"evidence": "/affected/0/versions"
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{
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"evidence": "/affected/0/versions"
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{
"value": "6.2.1+ds1+~cs6.1.13-6",
"evidence": "/affected/0/versions"
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{
"value": "6.2.1+ds1+~cs6.1.13-7",
"evidence": "/affected/0/versions"
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{
"value": "6.2.1+ds1+~cs6.1.13-8",
"evidence": "/affected/0/versions"
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{
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{
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{
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{
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{
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"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "6.2.1+ds1+~cs6.1.13-1",
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{
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"evidence": "/affected/1/versions"
},
{
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"evidence": "/affected/1/versions"
},
{
"value": "6.2.1+ds1+~cs6.1.13-2",
"evidence": "/affected/1/versions"
},
{
"value": "6.2.1+ds1+~cs6.1.13-3",
"evidence": "/affected/1/versions"
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{
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"evidence": "/affected/1/versions"
},
{
"value": "6.2.1+ds1+~cs6.1.13-5",
"evidence": "/affected/1/versions"
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{
"value": "6.2.1+ds1+~cs6.1.13-6",
"evidence": "/affected/1/versions"
},
{
"value": "6.2.1+ds1+~cs6.1.13-7",
"evidence": "/affected/1/versions"
},
{
"value": "6.2.1+ds1+~cs6.1.13-8",
"evidence": "/affected/1/versions"
},
{
"value": "6.2.1+ds1+~cs6.1.13-9",
"evidence": "/affected/1/versions"
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{
"value": "6.2.1+~cs7.0.8-1",
"evidence": "/affected/1/versions"
},
{
"value": "6.2.1+~cs7.0.8-1+deb13u1",
"evidence": "/affected/1/versions"
},
{
"value": "7.5.16+~4.0.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "7.5.16+~4.0.1-2",
"evidence": "/affected/1/versions"
},
{
"value": "7.5.19+~4.0.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "7.5.19+~4.0.1-2",
"evidence": "/affected/1/versions"
},
{
"value": "7.5.22+~4.0.1-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "node-tar",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "7.5.16+~4.0.1-2",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "6.2.1+ds1+~cs6.1.13-1",
"evidence": "/affected/2/versions"
},
{
"value": "6.2.1+ds1+~cs6.1.13-10",
"evidence": "/affected/2/versions"
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{
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"evidence": "/affected/2/versions"
},
{
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"evidence": "/affected/2/versions"
},
{
"value": "6.2.1+ds1+~cs6.1.13-3",
"evidence": "/affected/2/versions"
},
{
"value": "6.2.1+ds1+~cs6.1.13-4",
"evidence": "/affected/2/versions"
},
{
"value": "6.2.1+ds1+~cs6.1.13-5",
"evidence": "/affected/2/versions"
},
{
"value": "6.2.1+ds1+~cs6.1.13-6",
"evidence": "/affected/2/versions"
},
{
"value": "6.2.1+ds1+~cs6.1.13-7",
"evidence": "/affected/2/versions"
},
{
"value": "6.2.1+ds1+~cs6.1.13-8",
"evidence": "/affected/2/versions"
},
{
"value": "6.2.1+ds1+~cs6.1.13-9",
"evidence": "/affected/2/versions"
},
{
"value": "6.2.1+~cs7.0.8-1",
"evidence": "/affected/2/versions"
},
{
"value": "7.5.16+~4.0.1-1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-53655",
"aliases": [
"DEBIAN-CVE-2026-53655"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "node-tar",
"purl": "pkg:deb/debian/node-tar?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"6.1.13+~cs7.0.5-1",
"6.1.13+~cs7.0.5-1+deb12u1",
"6.1.13+~cs7.0.5-2",
"6.1.13+~cs7.0.5-3",
"6.1.13+~cs7.0.5-4",
"6.2.1+ds1+~cs6.1.13-1",
"6.2.1+ds1+~cs6.1.13-10",
"6.2.1+ds1+~cs6.1.13-11",
"6.2.1+ds1+~cs6.1.13-2",
"6.2.1+ds1+~cs6.1.13-3",
"6.2.1+ds1+~cs6.1.13-4",
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"6.2.1+ds1+~cs6.1.13-9",
"6.2.1+~cs7.0.8-1",
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"7.5.19+~4.0.1-2",
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"database_specific": {
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},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
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}
],
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"purl": "pkg:deb/debian/node-tar?arch=source&distro=trixie",
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"6.2.1+~cs7.0.8-1",
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"7.5.16+~4.0.1-1",
"7.5.16+~4.0.1-2",
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"7.5.19+~4.0.1-2",
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},
"ecosystem_specific": {
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}
},
{
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{
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}
]
}
],
"package": {
"name": "node-tar",
"purl": "pkg:deb/debian/node-tar?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
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"6.2.1+ds1+~cs6.1.13-10",
"6.2.1+ds1+~cs6.1.13-11",
"6.2.1+ds1+~cs6.1.13-2",
"6.2.1+ds1+~cs6.1.13-3",
"6.2.1+ds1+~cs6.1.13-4",
"6.2.1+ds1+~cs6.1.13-5",
"6.2.1+ds1+~cs6.1.13-6",
"6.2.1+ds1+~cs6.1.13-7",
"6.2.1+ds1+~cs6.1.13-8",
"6.2.1+ds1+~cs6.1.13-9",
"6.2.1+~cs7.0.8-1",
"7.5.16+~4.0.1-1"
],
"database_specific": {
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},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-26T11:47:24.332999228Z",
"provider": "osv",
"upstream": [
"CVE-2026-53655"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-53655"
]
},
"related_cves": [
{
"value": "CVE-2026-53655",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 450765,
"published_at": "2026-06-22T16:16:38.593+00:00"
}