UBUNTU-CVE-2026-86320

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Source
https://ubuntu.com/security/CVE-2026-86320
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86320.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-86320
Upstream
  • CVE-2026-86320
Published
2026-09-17T08:17:00Z
Modified
2026-09-24T02:00:37Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in flatpak-builder where Git hooks are not disabled when applying patch sources with use-git-am: true. An attacker who can provide a malicious source containing a Git post-applypatch hook can cause the hook to execute on the host during the build process, resulting in arbitrary code execution with the privileges of the user running flatpak-builder.

References

Affected packages

Ubuntu:18.04:LTS / flatpak-builder

Package

Name
flatpak-builder
Purl
pkg:deb/ubuntu/flatpak-builder?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
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

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "flatpak-builder",
            "binary_version": "0.10.9-1ubuntu1"
        },
        {
            "binary_name": "flatpak-builder-tests",
            "binary_version": "0.10.9-1ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86320.json"

Ubuntu:20.04:LTS / flatpak-builder

Package

Name
flatpak-builder
Purl
pkg:deb/ubuntu/flatpak-builder?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.0.8-2
1.0.9-1
1.0.10-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "flatpak-builder",
            "binary_version": "1.0.10-1"
        },
        {
            "binary_name": "flatpak-builder-tests",
            "binary_version": "1.0.10-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86320.json"

Ubuntu:22.04:LTS / flatpak-builder

Package

Name
flatpak-builder
Purl
pkg:deb/ubuntu/flatpak-builder?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.0.14-2
1.2.0-1
1.2.1-1
1.2.2-1
1.2.2-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "flatpak-builder",
            "binary_version": "1.2.2-2"
        },
        {
            "binary_name": "flatpak-builder-tests",
            "binary_version": "1.2.2-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86320.json"

Ubuntu:24.04:LTS / flatpak-builder

Package

Name
flatpak-builder
Purl
pkg:deb/ubuntu/flatpak-builder?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.2.3-1
1.4.0-1
1.4.1-1
1.4.2-1build1
1.4.2-1build2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "flatpak-builder",
            "binary_version": "1.4.2-1build2"
        },
        {
            "binary_name": "flatpak-builder-tests",
            "binary_version": "1.4.2-1build2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86320.json"

Ubuntu:26.04:LTS / flatpak-builder

Package

Name
flatpak-builder
Purl
pkg:deb/ubuntu/flatpak-builder?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.4.6-2
1.4.7-1
1.4.8-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "flatpak-builder",
            "binary_version": "1.4.8-1"
        },
        {
            "binary_name": "flatpak-builder-tests",
            "binary_version": "1.4.8-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86320.json"