Unrated

UBUNTU-CVE-2026-96282

Type: advisorySource: OSV1 source record

A malicious Flatpak extension can probe the host filesystem to determine what files and directories exist at arbitrary paths, and host directory listings can be disclosed to sandboxed applications using the extension. Additionally, unvalidated extension metadata can cause extension content to be mounted at unintended locations inside the sandbox.

Announced 27 Sept 2026Source revision 1

Original source ↗

UBUNTU-CVE-2026-96282

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:UBUNTU-CVE-2026-96282

flatpak

Source reference: /affected/0/package/name

Affected versions: 0.8.7-5
Source reference: /affected/0/versions
0.10.0-1
Source reference: /affected/0/versions
0.10.0-2
Source reference: /affected/0/versions
0.10.1-1
Source reference: /affected/0/versions
0.10.2-1
Source reference: /affected/0/versions
0.10.2.1-1
Source reference: /affected/0/versions
0.10.2.1-2
Source reference: /affected/0/versions
0.10.3-1
Source reference: /affected/0/versions
0.11.1-0ubuntu1
Source reference: /affected/0/versions
0.11.3-2
Source reference: /affected/0/versions
0.11.3-3
Source reference: /affected/0/versions
0.11.7-0ubuntu0.1
Source reference: /affected/0/versions
1.0.1-0ubuntu0.1
Source reference: /affected/0/versions
1.0.6-0ubuntu0.1
Source reference: /affected/0/versions
1.0.7-0ubuntu0.18.04.1
Source reference: /affected/0/versions
1.0.8-0ubuntu0.18.04.1
Source reference: /affected/0/versions
1.0.9-0ubuntu0.1
Source reference: /affected/0/versions
1.0.9-0ubuntu0.2
Source reference: /affected/0/versions
1.0.9-0ubuntu0.3
Source reference: /affected/0/versions
1.0.9-0ubuntu0.4
Source reference: /affected/0/versions
1.0.9-0ubuntu0.4+esm1
Source reference: /affected/0/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

flatpak

Source reference: /affected/1/package/name

Affected versions: 1.4.3-1
Source reference: /affected/1/versions
1.6.0-1
Source reference: /affected/1/versions
1.6.1-1
Source reference: /affected/1/versions
1.6.2-1
Source reference: /affected/1/versions
1.6.3-1
Source reference: /affected/1/versions
1.6.5-0ubuntu0.1
Source reference: /affected/1/versions
1.6.5-0ubuntu0.2
Source reference: /affected/1/versions
1.6.5-0ubuntu0.3
Source reference: /affected/1/versions
1.6.5-0ubuntu0.4
Source reference: /affected/1/versions
1.6.5-0ubuntu0.5
Source reference: /affected/1/versions
1.6.5-0ubuntu0.5+esm1
Source reference: /affected/1/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

flatpak

Source reference: /affected/2/package/name

Affected versions: 1.10.2-3
Source reference: /affected/2/versions
1.12.2-1
Source reference: /affected/2/versions
1.12.2-2
Source reference: /affected/2/versions
1.12.3-1
Source reference: /affected/2/versions
1.12.4-1
Source reference: /affected/2/versions
1.12.5-1
Source reference: /affected/2/versions
1.12.6-1
Source reference: /affected/2/versions
1.12.7-1
Source reference: /affected/2/versions
1.12.7-1ubuntu0.1
Source reference: /affected/2/versions
1.12.7-1ubuntu0.1+esm1
Source reference: /affected/2/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

flatpak

Source reference: /affected/3/package/name

Affected versions: 1.14.4-2
Source reference: /affected/3/versions
1.14.5-1
Source reference: /affected/3/versions
1.14.5-1build1
Source reference: /affected/3/versions
1.14.5-1build4
Source reference: /affected/3/versions
1.14.5-1build5
Source reference: /affected/3/versions
1.14.5-1build6
Source reference: /affected/3/versions
1.14.6-1
Source reference: /affected/3/versions
1.14.6-1ubuntu0.1
Source reference: /affected/3/versions
1.14.6-1ubuntu0.1+esm1
Source reference: /affected/3/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

flatpak

Source reference: /affected/4/package/name

Affected versions: 1.16.1-2ubuntu1
Source reference: /affected/4/versions
1.16.1-3ubuntu1
Source reference: /affected/4/versions
1.16.2-1
Source reference: /affected/4/versions
1.16.3-1
Source reference: /affected/4/versions
1.16.3-1build1
Source reference: /affected/4/versions
1.16.4-1
Source reference: /affected/4/versions
1.16.4-2
Source reference: /affected/4/versions
1.16.6-1
Source reference: /affected/4/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "flatpak",
      "purl": "pkg:deb/ubuntu/flatpak?arch=source&distro=esm-apps%2Fbionic",
      "ecosystem": "Ubuntu:Pro:18.04:LTS"
    },
    "versions": [
      "0.8.7-5",
      "0.10.0-1",
      "0.10.0-2",
      "0.10.1-1",
      "0.10.2-1",
      "0.10.2.1-1",
      "0.10.2.1-2",
      "0.10.3-1",
      "0.11.1-0ubuntu1",
      "0.11.3-2",
      "0.11.3-3",
      "0.11.7-0ubuntu0.1",
      "1.0.1-0ubuntu0.1",
      "1.0.6-0ubuntu0.1",
      "1.0.7-0ubuntu0.18.04.1",
      "1.0.8-0ubuntu0.18.04.1",
      "1.0.9-0ubuntu0.1",
      "1.0.9-0ubuntu0.2",
      "1.0.9-0ubuntu0.3",
      "1.0.9-0ubuntu0.4",
      "1.0.9-0ubuntu0.4+esm1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-96282.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "flatpak",
          "binary_version": "1.0.9-0ubuntu0.4+esm1"
        },
        {
          "binary_name": "flatpak-tests",
          "binary_version": "1.0.9-0ubuntu0.4+esm1"
        },
        {
          "binary_name": "gir1.2-flatpak-1.0",
          "binary_version": "1.0.9-0ubuntu0.4+esm1"
        },
        {
          "binary_name": "libflatpak0",
          "binary_version": "1.0.9-0ubuntu0.4+esm1"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "flatpak",
      "purl": "pkg:deb/ubuntu/flatpak?arch=source&distro=esm-apps%2Ffocal",
      "ecosystem": "Ubuntu:Pro:20.04:LTS"
    },
    "versions": [
      "1.4.3-1",
      "1.6.0-1",
      "1.6.1-1",
      "1.6.2-1",
      "1.6.3-1",
      "1.6.5-0ubuntu0.1",
      "1.6.5-0ubuntu0.2",
      "1.6.5-0ubuntu0.3",
      "1.6.5-0ubuntu0.4",
      "1.6.5-0ubuntu0.5",
      "1.6.5-0ubuntu0.5+esm1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-96282.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "flatpak",
          "binary_version": "1.6.5-0ubuntu0.5+esm1"
        },
        {
          "binary_name": "flatpak-tests",
          "binary_version": "1.6.5-0ubuntu0.5+esm1"
        },
        {
          "binary_name": "gir1.2-flatpak-1.0",
          "binary_version": "1.6.5-0ubuntu0.5+esm1"
        },
        {
          "binary_name": "libflatpak0",
          "binary_version": "1.6.5-0ubuntu0.5+esm1"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "flatpak",
      "purl": "pkg:deb/ubuntu/flatpak?arch=source&distro=esm-apps%2Fjammy",
      "ecosystem": "Ubuntu:Pro:22.04:LTS"
    },
    "versions": [
      "1.10.2-3",
      "1.12.2-1",
      "1.12.2-2",
      "1.12.3-1",
      "1.12.4-1",
      "1.12.5-1",
      "1.12.6-1",
      "1.12.7-1",
      "1.12.7-1ubuntu0.1",
      "1.12.7-1ubuntu0.1+esm1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-96282.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "flatpak",
          "binary_version": "1.12.7-1ubuntu0.1+esm1"
        },
        {
          "binary_name": "flatpak-tests",
          "binary_version": "1.12.7-1ubuntu0.1+esm1"
        },
        {
          "binary_name": "gir1.2-flatpak-1.0",
          "binary_version": "1.12.7-1ubuntu0.1+esm1"
        },
        {
          "binary_name": "libflatpak0",
          "binary_version": "1.12.7-1ubuntu0.1+esm1"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "flatpak",
      "purl": "pkg:deb/ubuntu/flatpak?arch=source&distro=esm-apps%2Fnoble",
      "ecosystem": "Ubuntu:Pro:24.04:LTS"
    },
    "versions": [
      "1.14.4-2",
      "1.14.5-1",
      "1.14.5-1build1",
      "1.14.5-1build4",
      "1.14.5-1build5",
      "1.14.5-1build6",
      "1.14.6-1",
      "1.14.6-1ubuntu0.1",
      "1.14.6-1ubuntu0.1+esm1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-96282.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "flatpak",
          "binary_version": "1.14.6-1ubuntu0.1+esm1"
        },
        {
          "binary_name": "flatpak-tests",
          "binary_version": "1.14.6-1ubuntu0.1+esm1"
        },
        {
          "binary_name": "gir1.2-flatpak-1.0",
          "binary_version": "1.14.6-1ubuntu0.1+esm1"
        },
        {
          "binary_name": "libflatpak0",
          "binary_version": "1.14.6-1ubuntu0.1+esm1"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "flatpak",
      "purl": "pkg:deb/ubuntu/flatpak?arch=source&distro=resolute",
      "ecosystem": "Ubuntu:26.04:LTS"
    },
    "versions": [
      "1.16.1-2ubuntu1",
      "1.16.1-3ubuntu1",
      "1.16.2-1",
      "1.16.3-1",
      "1.16.3-1build1",
      "1.16.4-1",
      "1.16.4-2",
      "1.16.6-1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-96282.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "flatpak",
          "binary_version": "1.16.6-1"
        },
        {
          "binary_name": "flatpak-tests",
          "binary_version": "1.16.6-1"
        },
        {
          "binary_name": "gir1.2-flatpak-1.0",
          "binary_version": "1.16.6-1"
        },
        {
          "binary_name": "libflatpak0",
          "binary_version": "1.16.6-1"
        }
      ]
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #51971 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 14:36:51 GMT
Publisher date: Sun, 27 Sep 2026 22:17:00 GMT

Read the original announcement