Medium
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
- 0.10.1-1, 0.10.4-1, 0.10.5-1, 0.10.6-1, 0.10.6-2, 0.10.7-1, 0.10.8-1, 0.10.9-1, 0.10.9-1ubuntu1, 1.0.10-1, 1.0.14-2, 1.0.8-2, 1.0.9-1, 1.2.0-1, 1.2.1-1, 1.2.2-1, 1.2.2-2, 1.2.3-1, 1.4.0-1, 1.4.1-1, 1.4.10-1, 1.4.11-1, 1.4.12-1, 1.4.2-1build1, 1.4.2-1build2, 1.4.6-2, 1.4.7-1, 1.4.8-1, 1.4.9-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-107466
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:00 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:UBUNTU-CVE-2026-107466
flatpak-builder
Fixed versions: Not specified
flatpak-builder
Fixed versions: Not specified
flatpak-builder
Fixed versions: Not specified
flatpak-builder
Fixed versions: Not specified
flatpak-builder
Fixed versions: Not specified
flatpak-builder
Fixed versions: Not specified
Complete source record
{
"id": "ee3cd21f684e53aa1e76a67ea83d96f47ab80d08eed449db889c8658cbb6b01b",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-107466",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-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:UBUNTU-CVE-2026-107466",
"products": [
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{
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{
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{
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"affected_versions": [
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{
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{
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{
"value": "1.4.11-1",
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{
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},
{
"name": {
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"evidence": "/affected/5/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
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"evidence": "/affected/5/versions"
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{
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{
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],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-107466",
"aliases": [
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],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
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{
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"events": [
{
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"package": {
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"purl": "pkg:deb/ubuntu/flatpak-builder?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"0.10.1-1",
"0.10.4-1",
"0.10.5-1",
"0.10.6-1",
"0.10.6-2",
"0.10.7-1",
"0.10.8-1",
"0.10.9-1",
"0.10.9-1ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107466.json"
},
"ecosystem_specific": {
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"binary_version": "0.10.9-1ubuntu1"
},
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"binary_name": "flatpak-builder-tests",
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}
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}
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"purl": "pkg:deb/ubuntu/flatpak-builder?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
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"1.0.9-1",
"1.0.10-1"
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"database_specific": {
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},
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"1.2.0-1",
"1.2.1-1",
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],
"modified": "2026-10-17T12:58:01.544625639Z",
"provider": "osv",
"upstream": [
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],
"references": [
"https://ubuntu.com/security/CVE-2026-107466",
"https://www.cve.org/CVERecord?id=CVE-2026-107466",
"https://access.redhat.com/security/cve/CVE-2026-107466",
"https://bugzilla.redhat.com/show_bug.cgi?id=2471600"
]
},
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},
"source_id": "core-osv",
"document_id": 357882,
"published_at": "2026-10-08T08:16:00+00:00"
}