Medium
tar — security advisory
A flaw was found in tar. A remote attacker could exploit this vulnerability by crafting a malicious archive, leading to hidden file injection with fully attacker-controlled content. This bypasses pre-extraction inspection mechanisms, potentially allowing an attacker to introduce malicious files onto a system without detection.
- Products
- tar
- Affected versions
- 1.34+dfsg-1.2, 1.34+dfsg-1.2+deb12u1, 1.34+dfsg-1.3, 1.34+dfsg-1.4, 1.35+dfsg-1, 1.35+dfsg-2, 1.35+dfsg-3, 1.35+dfsg-3.1, 1.35+dfsg-4, 1.35+dfsg-5, 1.35+dfsg-5+hurd.1, 1.35+dfsg-6, 1.35+dfsg-7
- Fixed versions
- Not specified
- CVEs
- CVE-2026-5704
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 17:55 UTC · Revision 1
Source evidence
A flaw was found in tar. A remote attacker could exploit this vulnerability by crafting a malicious archive, leading to hidden file injection with fully attacker-controlled content. This bypasses pre-extraction inspection mechanisms, potentially allowing an attacker to introduce malicious files onto a system without detection.
osv:DEBIAN-CVE-2026-5704
tar
Fixed versions: Not specified
tar
Fixed versions: Not specified
tar
Fixed versions: Not specified
Complete source record
{
"id": "c785b1807a98636e70e76ac73f786eadae8555278878f8d06aa708f909037c99",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-5704",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-5704",
"summary": "A flaw was found in tar. A remote attacker could exploit this vulnerability by crafting a malicious archive, leading to hidden file injection with fully attacker-controlled content. This bypasses pre-extraction inspection mechanisms, potentially allowing an attacker to introduce malicious files onto a system without detection.",
"evidence": "osv:DEBIAN-CVE-2026-5704",
"products": [
{
"name": {
"value": "tar",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.34+dfsg-1.2",
"evidence": "/affected/0/versions"
},
{
"value": "1.34+dfsg-1.2+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "1.34+dfsg-1.3",
"evidence": "/affected/0/versions"
},
{
"value": "1.34+dfsg-1.4",
"evidence": "/affected/0/versions"
},
{
"value": "1.35+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.35+dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.35+dfsg-3",
"evidence": "/affected/0/versions"
},
{
"value": "1.35+dfsg-3.1",
"evidence": "/affected/0/versions"
},
{
"value": "1.35+dfsg-4",
"evidence": "/affected/0/versions"
},
{
"value": "1.35+dfsg-5",
"evidence": "/affected/0/versions"
},
{
"value": "1.35+dfsg-5+hurd.1",
"evidence": "/affected/0/versions"
},
{
"value": "1.35+dfsg-6",
"evidence": "/affected/0/versions"
},
{
"value": "1.35+dfsg-7",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "tar",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.35+dfsg-3.1",
"evidence": "/affected/1/versions"
},
{
"value": "1.35+dfsg-4",
"evidence": "/affected/1/versions"
},
{
"value": "1.35+dfsg-5",
"evidence": "/affected/1/versions"
},
{
"value": "1.35+dfsg-5+hurd.1",
"evidence": "/affected/1/versions"
},
{
"value": "1.35+dfsg-6",
"evidence": "/affected/1/versions"
},
{
"value": "1.35+dfsg-7",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "tar",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.35+dfsg-3.1",
"evidence": "/affected/2/versions"
},
{
"value": "1.35+dfsg-4",
"evidence": "/affected/2/versions"
},
{
"value": "1.35+dfsg-5",
"evidence": "/affected/2/versions"
},
{
"value": "1.35+dfsg-5+hurd.1",
"evidence": "/affected/2/versions"
},
{
"value": "1.35+dfsg-6",
"evidence": "/affected/2/versions"
},
{
"value": "1.35+dfsg-7",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-5704",
"aliases": [
"DEBIAN-CVE-2026-5704"
],
"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": "tar",
"purl": "pkg:deb/debian/tar?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1.34+dfsg-1.2",
"1.34+dfsg-1.2+deb12u1",
"1.34+dfsg-1.3",
"1.34+dfsg-1.4",
"1.35+dfsg-1",
"1.35+dfsg-2",
"1.35+dfsg-3",
"1.35+dfsg-3.1",
"1.35+dfsg-4",
"1.35+dfsg-5",
"1.35+dfsg-5+hurd.1",
"1.35+dfsg-6",
"1.35+dfsg-7"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-5704.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "tar",
"purl": "pkg:deb/debian/tar?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1.35+dfsg-3.1",
"1.35+dfsg-4",
"1.35+dfsg-5",
"1.35+dfsg-5+hurd.1",
"1.35+dfsg-6",
"1.35+dfsg-7"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-5704.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "tar",
"purl": "pkg:deb/debian/tar?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.35+dfsg-3.1",
"1.35+dfsg-4",
"1.35+dfsg-5",
"1.35+dfsg-5+hurd.1",
"1.35+dfsg-6",
"1.35+dfsg-7"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-5704.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-27T10:02:10.180230273Z",
"provider": "osv",
"upstream": [
"CVE-2026-5704"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-5704"
]
},
"related_cves": [
{
"value": "CVE-2026-5704",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 461493,
"published_at": "2026-04-06T16:16:42.14+00:00"
}