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flatpak security update

Type: advisorySource: OSV1 source record

flatpak is a system for building, distributing and running sandboxed desktop applications on Linux. See https://wiki.gnome.org/Projects/SandboxedApps for more information. Security Fix(es): In Flatpak before 1.18.1, a malicious sandboxed app can obtain arbitrary read and write access to files on the host, which can be escalated to arbitrary code execution on the host, a different vulnerability than CVE-2026-76925. Flatpak creates a few app data directories (e.g., /var/cache, /var/data, /var/config, and /var/tmp) in every sandbox on every app launch where, in some cases, components of the path are attacker-controlled. Missing symlink protection can redirect the directories. Some of these directories are bind-mounted by Flatpak by passing the path (e.g., /home/user/.var/app/APP_ID/cache/tmp), which contains attacker-controlled directories (tmp) to bwrap --bind SRC DST. bwrap passes the path on to the kernel, which then follows symlinks. A malicious symlink can point to arbitrary locations on the host and it will become mounted inside the sandbox.(CVE-2026-90616)

Announced Group revision 1
Original source ↗

OESA-2026-4098

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:OESA-2026-4098

flatpak

Source reference: /affected/0/package/name

Affected versions
Not stated in this record
Fixed versions
1.10.2-13.oe2403sp4

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

flatpak

Source reference: /affected/1/package/name

Affected versions
Not stated in this record
Fixed versions
1.0.3-16.oe2003sp4

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

flatpak

Source reference: /affected/2/package/name

Affected versions
Not stated in this record
Fixed versions
1.10.2-13.oe2203sp4

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

flatpak

Source reference: /affected/3/package/name

Affected versions
Not stated in this record
Fixed versions
1.10.2-13.oe2403sp1

Source reference: /affected/3/ranges

Prerequisites
Not stated in this record

flatpak

Source reference: /affected/4/package/name

Affected versions
Not stated in this record
Fixed versions
1.10.2-13.oe2403sp3

Source reference: /affected/4/ranges

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"
          },
          {
            "fixed": "1.10.2-13.oe2403sp4"
          }
        ]
      }
    ],
    "package": {
      "name": "flatpak",
      "purl": "pkg:rpm/openEuler/flatpak&distro=openEuler-24.03-LTS-SP4",
      "ecosystem": "openEuler:24.03-LTS-SP4"
    },
    "database_specific": {
      "source": "https://repo.openeuler.org/security/data/osv/OESA-2026-4098.json"
    },
    "ecosystem_specific": {
      "src": [
        "flatpak-1.10.2-13.oe2403sp4.src.rpm"
      ],
      "noarch": [
        "flatpak-help-1.10.2-13.oe2403sp4.noarch.rpm"
      ],
      "x86_64": [
        "flatpak-1.10.2-13.oe2403sp4.x86_64.rpm",
        "flatpak-debuginfo-1.10.2-13.oe2403sp4.x86_64.rpm",
        "flatpak-debugsource-1.10.2-13.oe2403sp4.x86_64.rpm",
        "flatpak-devel-1.10.2-13.oe2403sp4.x86_64.rpm"
      ],
      "aarch64": [
        "flatpak-1.10.2-13.oe2403sp4.aarch64.rpm",
        "flatpak-debuginfo-1.10.2-13.oe2403sp4.aarch64.rpm",
        "flatpak-debugsource-1.10.2-13.oe2403sp4.aarch64.rpm",
        "flatpak-devel-1.10.2-13.oe2403sp4.aarch64.rpm"
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.0.3-16.oe2003sp4"
          }
        ]
      }
    ],
    "package": {
      "name": "flatpak",
      "purl": "pkg:rpm/openEuler/flatpak&distro=openEuler-20.03-LTS-SP4",
      "ecosystem": "openEuler:20.03-LTS-SP4"
    },
    "database_specific": {
      "source": "https://repo.openeuler.org/security/data/osv/OESA-2026-4098.json"
    },
    "ecosystem_specific": {
      "src": [
        "flatpak-1.0.3-16.oe2003sp4.src.rpm"
      ],
      "noarch": [
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      ],
      "x86_64": [
        "flatpak-1.0.3-16.oe2003sp4.x86_64.rpm",
        "flatpak-debuginfo-1.0.3-16.oe2003sp4.x86_64.rpm",
        "flatpak-debugsource-1.0.3-16.oe2003sp4.x86_64.rpm",
        "flatpak-devel-1.0.3-16.oe2003sp4.x86_64.rpm"
      ],
      "aarch64": [
        "flatpak-1.0.3-16.oe2003sp4.aarch64.rpm",
        "flatpak-debuginfo-1.0.3-16.oe2003sp4.aarch64.rpm",
        "flatpak-debugsource-1.0.3-16.oe2003sp4.aarch64.rpm",
        "flatpak-devel-1.0.3-16.oe2003sp4.aarch64.rpm"
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.10.2-13.oe2203sp4"
          }
        ]
      }
    ],
    "package": {
      "name": "flatpak",
      "purl": "pkg:rpm/openEuler/flatpak&distro=openEuler-22.03-LTS-SP4",
      "ecosystem": "openEuler:22.03-LTS-SP4"
    },
    "database_specific": {
      "source": "https://repo.openeuler.org/security/data/osv/OESA-2026-4098.json"
    },
    "ecosystem_specific": {
      "src": [
        "flatpak-1.10.2-13.oe2203sp4.src.rpm"
      ],
      "noarch": [
        "flatpak-help-1.10.2-13.oe2203sp4.noarch.rpm"
      ],
      "x86_64": [
        "flatpak-1.10.2-13.oe2203sp4.x86_64.rpm",
        "flatpak-debuginfo-1.10.2-13.oe2203sp4.x86_64.rpm",
        "flatpak-debugsource-1.10.2-13.oe2203sp4.x86_64.rpm",
        "flatpak-devel-1.10.2-13.oe2203sp4.x86_64.rpm"
      ],
      "aarch64": [
        "flatpak-1.10.2-13.oe2203sp4.aarch64.rpm",
        "flatpak-debuginfo-1.10.2-13.oe2203sp4.aarch64.rpm",
        "flatpak-debugsource-1.10.2-13.oe2203sp4.aarch64.rpm",
        "flatpak-devel-1.10.2-13.oe2203sp4.aarch64.rpm"
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.10.2-13.oe2403sp1"
          }
        ]
      }
    ],
    "package": {
      "name": "flatpak",
      "purl": "pkg:rpm/openEuler/flatpak&distro=openEuler-24.03-LTS-SP1",
      "ecosystem": "openEuler:24.03-LTS-SP1"
    },
    "database_specific": {
      "source": "https://repo.openeuler.org/security/data/osv/OESA-2026-4098.json"
    },
    "ecosystem_specific": {
      "src": [
        "flatpak-1.10.2-13.oe2403sp1.src.rpm"
      ],
      "noarch": [
        "flatpak-help-1.10.2-13.oe2403sp1.noarch.rpm"
      ],
      "x86_64": [
        "flatpak-1.10.2-13.oe2403sp1.x86_64.rpm",
        "flatpak-debuginfo-1.10.2-13.oe2403sp1.x86_64.rpm",
        "flatpak-debugsource-1.10.2-13.oe2403sp1.x86_64.rpm",
        "flatpak-devel-1.10.2-13.oe2403sp1.x86_64.rpm"
      ],
      "aarch64": [
        "flatpak-1.10.2-13.oe2403sp1.aarch64.rpm",
        "flatpak-debuginfo-1.10.2-13.oe2403sp1.aarch64.rpm",
        "flatpak-debugsource-1.10.2-13.oe2403sp1.aarch64.rpm",
        "flatpak-devel-1.10.2-13.oe2403sp1.aarch64.rpm"
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.10.2-13.oe2403sp3"
          }
        ]
      }
    ],
    "package": {
      "name": "flatpak",
      "purl": "pkg:rpm/openEuler/flatpak&distro=openEuler-24.03-LTS-SP3",
      "ecosystem": "openEuler:24.03-LTS-SP3"
    },
    "database_specific": {
      "source": "https://repo.openeuler.org/security/data/osv/OESA-2026-4098.json"
    },
    "ecosystem_specific": {
      "src": [
        "flatpak-1.10.2-13.oe2403sp3.src.rpm"
      ],
      "noarch": [
        "flatpak-help-1.10.2-13.oe2403sp3.noarch.rpm"
      ],
      "x86_64": [
        "flatpak-1.10.2-13.oe2403sp3.x86_64.rpm",
        "flatpak-debuginfo-1.10.2-13.oe2403sp3.x86_64.rpm",
        "flatpak-debugsource-1.10.2-13.oe2403sp3.x86_64.rpm",
        "flatpak-devel-1.10.2-13.oe2403sp3.x86_64.rpm"
      ],
      "aarch64": [
        "flatpak-1.10.2-13.oe2403sp3.aarch64.rpm",
        "flatpak-debuginfo-1.10.2-13.oe2403sp3.aarch64.rpm",
        "flatpak-debugsource-1.10.2-13.oe2403sp3.aarch64.rpm",
        "flatpak-devel-1.10.2-13.oe2403sp3.aarch64.rpm"
      ]
    }
  }
]

Publisher severity

high

Source reference: /database_specific/severity

Event
#14740 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. OESA-2026-4098 · Revision 1Source updated