Medium
gnome-tweaks — security advisory
The shell theme installer in gnome-tweaks extracts user-supplied ZIP archives without validating archive member paths. As a result, a crafted theme archive can write files outside ~/.themes by using ../ path traversal, absolute paths, or symlink entries.
- Products
- gnome-tweaks
- Affected versions
- 3.27.4-1ubuntu1, 3.27.90.2-1ubuntu1, 3.27.92-1ubuntu1, 3.28.0-1, 3.28.1-1, 3.34.0-2, 3.34.0-2ubuntu1, 40.0-3, 40.0-4, 40.0-5, 40.0-6, 42~beta-1, 42~beta-1ubuntu1, 42~beta-1ubuntu2, 42~beta-4, 45.1-1, 46.0-1, 46.0-2, 46.1-1, 46~beta-1, 46~beta-2, 49.0-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-74859
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:13 UTC · Revision 1
Source evidence
The shell theme installer in gnome-tweaks extracts user-supplied ZIP archives without validating archive member paths. As a result, a crafted theme archive can write files outside ~/.themes by using ../ path traversal, absolute paths, or symlink entries.
osv:UBUNTU-CVE-2026-74859
gnome-tweaks
Fixed versions: Not specified
gnome-tweaks
Fixed versions: Not specified
gnome-tweaks
Fixed versions: Not specified
gnome-tweaks
Fixed versions: Not specified
gnome-tweaks
Fixed versions: Not specified
gnome-tweaks
Fixed versions: Not specified
Complete source record
{
"id": "627c462b9e4f1cf6748e26a492876ab3cbc9c808f0a5fa85ae743bdebea49625",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-74859",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-74859",
"summary": "The shell theme installer in gnome-tweaks extracts user-supplied ZIP archives without validating archive member paths. As a result, a crafted theme archive can write files outside ~/.themes by using ../ path traversal, absolute paths, or symlink entries.",
"evidence": "osv:UBUNTU-CVE-2026-74859",
"products": [
{
"name": {
"value": "gnome-tweaks",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.27.4-1ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "3.27.90.2-1ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "3.27.92-1ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "3.28.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.28.1-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "gnome-tweaks",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "3.34.0-2",
"evidence": "/affected/1/versions"
},
{
"value": "3.34.0-2ubuntu1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "gnome-tweaks",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "40.0-3",
"evidence": "/affected/2/versions"
},
{
"value": "40.0-4",
"evidence": "/affected/2/versions"
},
{
"value": "40.0-5",
"evidence": "/affected/2/versions"
},
{
"value": "40.0-6",
"evidence": "/affected/2/versions"
},
{
"value": "42~beta-1",
"evidence": "/affected/2/versions"
},
{
"value": "42~beta-1ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "42~beta-1ubuntu2",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
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"evidence": "/affected/3/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "42~beta-4",
"evidence": "/affected/3/versions"
},
{
"value": "45.1-1",
"evidence": "/affected/3/versions"
},
{
"value": "46~beta-1",
"evidence": "/affected/3/versions"
},
{
"value": "46~beta-2",
"evidence": "/affected/3/versions"
},
{
"value": "46.0-1",
"evidence": "/affected/3/versions"
},
{
"value": "46.0-2",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "gnome-tweaks",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "49.0-1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "gnome-tweaks",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "46.1-1",
"evidence": "/affected/5/versions"
},
{
"value": "49.0-1",
"evidence": "/affected/5/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-74859",
"aliases": [
"UBUNTU-CVE-2026-74859"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "gnome-tweaks",
"purl": "pkg:deb/ubuntu/gnome-tweaks?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"3.27.4-1ubuntu1",
"3.27.90.2-1ubuntu1",
"3.27.92-1ubuntu1",
"3.28.0-1",
"3.28.1-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-74859.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "gnome-tweak-tool",
"binary_version": "3.28.1-1"
},
{
"binary_name": "gnome-tweaks",
"binary_version": "3.28.1-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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}
]
}
],
"package": {
"name": "gnome-tweaks",
"purl": "pkg:deb/ubuntu/gnome-tweaks?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"3.34.0-2",
"3.34.0-2ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-74859.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "gnome-tweak-tool",
"binary_version": "3.34.0-2ubuntu1"
},
{
"binary_name": "gnome-tweaks",
"binary_version": "3.34.0-2ubuntu1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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}
]
}
],
"package": {
"name": "gnome-tweaks",
"purl": "pkg:deb/ubuntu/gnome-tweaks?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"40.0-3",
"40.0-4",
"40.0-5",
"40.0-6",
"42~beta-1",
"42~beta-1ubuntu1",
"42~beta-1ubuntu2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-74859.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "gnome-tweaks",
"binary_version": "42~beta-1ubuntu2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
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{
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],
"package": {
"name": "gnome-tweaks",
"purl": "pkg:deb/ubuntu/gnome-tweaks?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"42~beta-4",
"45.1-1",
"46~beta-1",
"46~beta-2",
"46.0-1",
"46.0-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-74859.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "gnome-tweaks",
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}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
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{
"introduced": "0"
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],
"package": {
"name": "gnome-tweaks",
"purl": "pkg:deb/ubuntu/gnome-tweaks?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"49.0-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-74859.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "gnome-tweaks",
"binary_version": "49.0-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "gnome-tweaks",
"purl": "pkg:deb/ubuntu/gnome-tweaks?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"46.1-1",
"49.0-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-74859.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "gnome-tweaks",
"binary_version": "49.0-1"
}
]
}
}
],
"modified": "2026-10-17T13:00:37.852769130Z",
"provider": "osv",
"upstream": [
"CVE-2026-74859"
],
"references": [
"https://ubuntu.com/security/CVE-2026-74859",
"https://www.cve.org/CVERecord?id=CVE-2026-74859"
]
},
"related_cves": [
{
"value": "CVE-2026-74859",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 360739,
"published_at": "2026-09-08T09:18:00+00:00"
}