MediumFix available
flatpak-builder — security advisory
A flaw was found in flatpak-builder. This vulnerability allows an attacker to cause information disclosure by convincing a user or continuous integration (CI) system to process a crafted build manifest. By specifying local file Uniform Resource Identifiers (URIs) within source download definitions, the builder bypasses directory confinement checks. As a result, sensitive host files accessible to the build process can be read and incorporated into the build artifacts.
- Products
- flatpak-builder
- Affected versions
- 1.2.3-1, 1.3.1-1, 1.3.3-1, 1.3.4-1, 1.3.5-1, 1.4.0-1, 1.4.1-1, 1.4.10-1, 1.4.11-1, 1.4.12-1, 1.4.12-2, 1.4.2-1, 1.4.4-1, 1.4.4-1~bpo12+1, 1.4.4-2, 1.4.5-1, 1.4.6-1, 1.4.6-2, 1.4.7-1, 1.4.8-1, 1.4.9-1
- Fixed versions
- 1.4.11-1
- CVEs
- CVE-2026-107466
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 12:32 UTC · Revision 1
Source evidence
A flaw was found in flatpak-builder. This vulnerability allows an attacker to cause information disclosure by convincing a user or continuous integration (CI) system to process a crafted build manifest. By specifying local file Uniform Resource Identifiers (URIs) within source download definitions, the builder bypasses directory confinement checks. As a result, sensitive host files accessible to the build process can be read and incorporated into the build artifacts.
osv:DEBIAN-CVE-2026-107466
flatpak-builder
Fixed versions: Not specified
flatpak-builder
Fixed versions: Not specified
flatpak-builder
Fixed versions: 1.4.11-1
Complete source record
{
"id": "70fe19c347ab8031b23f37b86828431ab9471c35e1fe9b79f5ae399527b5d026",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-107466",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-107466",
"summary": "A flaw was found in flatpak-builder. This vulnerability allows an attacker to cause information disclosure by convincing a user or continuous integration (CI) system to process a crafted build manifest. By specifying local file Uniform Resource Identifiers (URIs) within source download definitions, the builder bypasses directory confinement checks. As a result, sensitive host files accessible to the build process can be read and incorporated into the build artifacts.",
"evidence": "osv:DEBIAN-CVE-2026-107466",
"products": [
{
"name": {
"value": "flatpak-builder",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.2.3-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.3-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.4-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.5-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.10-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.11-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.12-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.12-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.4-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.4-1~bpo12+1",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.4-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.5-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.6-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.6-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.7-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.8-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.9-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "flatpak-builder",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.4.10-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.4.11-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.4.12-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.4.12-2",
"evidence": "/affected/1/versions"
},
{
"value": "1.4.4-2",
"evidence": "/affected/1/versions"
},
{
"value": "1.4.5-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.4.6-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.4.6-2",
"evidence": "/affected/1/versions"
},
{
"value": "1.4.7-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.4.8-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.4.9-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "flatpak-builder",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.4.11-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "1.4.10-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.4.4-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.4.5-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.4.6-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.4.6-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.4.7-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.4.8-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.4.9-1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-107466",
"aliases": [
"DEBIAN-CVE-2026-107466"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "flatpak-builder",
"purl": "pkg:deb/debian/flatpak-builder?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1.2.3-1",
"1.3.1-1",
"1.3.3-1",
"1.3.4-1",
"1.3.5-1",
"1.4.0-1",
"1.4.1-1",
"1.4.10-1",
"1.4.11-1",
"1.4.12-1",
"1.4.12-2",
"1.4.2-1",
"1.4.4-1",
"1.4.4-1~bpo12+1",
"1.4.4-2",
"1.4.5-1",
"1.4.6-1",
"1.4.6-2",
"1.4.7-1",
"1.4.8-1",
"1.4.9-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-107466.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "flatpak-builder",
"purl": "pkg:deb/debian/flatpak-builder?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1.4.10-1",
"1.4.11-1",
"1.4.12-1",
"1.4.12-2",
"1.4.4-2",
"1.4.5-1",
"1.4.6-1",
"1.4.6-2",
"1.4.7-1",
"1.4.8-1",
"1.4.9-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-107466.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.4.11-1"
}
]
}
],
"package": {
"name": "flatpak-builder",
"purl": "pkg:deb/debian/flatpak-builder?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.4.10-1",
"1.4.4-2",
"1.4.5-1",
"1.4.6-1",
"1.4.6-2",
"1.4.7-1",
"1.4.8-1",
"1.4.9-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-107466.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-09T12:00:14.881702918Z",
"provider": "osv",
"upstream": [
"CVE-2026-107466"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-107466"
]
},
"related_cves": [
{
"value": "CVE-2026-107466",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 120724,
"published_at": "2026-10-08T08:16:34.193+00:00"
}