{
  "cveId": "CVE-2026-76925",
  "url": "https://patchblox.com/security/cve/CVE-2026-76925",
  "summary": "CVE-2026-76925 is fixed in 11 products on 1 platform, first by ALAS2023-2026-3143, released September 28, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "flatpak: In Flatpak before 1.18.1, a malicious sandboxed app can obtain arbitrary read and write access to files on the host,...",
  "description": "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 . 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.",
  "published": "2026-09-28T09:00:00Z",
  "severity": "important",
  "epss": 0.00103,
  "epssPercentile": 0.00953,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "flatpak",
      "release": "amzn 2023",
      "fixedVersion": "1.18.1-1.amzn2023",
      "fix": "ALAS2023-2026-3143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3143",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flatpak-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1.18.1-1.amzn2023",
      "fix": "ALAS2023-2026-3143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3143",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flatpak-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "1.18.1-1.amzn2023",
      "fix": "ALAS2023-2026-3143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3143",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flatpak-devel",
      "release": "amzn 2023",
      "fixedVersion": "1.18.1-1.amzn2023",
      "fix": "ALAS2023-2026-3143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3143",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flatpak-libs",
      "release": "amzn 2023",
      "fixedVersion": "1.18.1-1.amzn2023",
      "fix": "ALAS2023-2026-3143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3143",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flatpak-libs-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1.18.1-1.amzn2023",
      "fix": "ALAS2023-2026-3143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3143",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flatpak-selinux",
      "release": "amzn 2023",
      "fixedVersion": "1.18.1-1.amzn2023",
      "fix": "ALAS2023-2026-3143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3143",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flatpak-session-helper",
      "release": "amzn 2023",
      "fixedVersion": "1.18.1-1.amzn2023",
      "fix": "ALAS2023-2026-3143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3143",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flatpak-session-helper-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1.18.1-1.amzn2023",
      "fix": "ALAS2023-2026-3143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3143",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flatpak-tests",
      "release": "amzn 2023",
      "fixedVersion": "1.18.1-1.amzn2023",
      "fix": "ALAS2023-2026-3143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3143",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flatpak-tests-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1.18.1-1.amzn2023",
      "fix": "ALAS2023-2026-3143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3143",
      "released": "2026-09-28T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-12T01:51:14Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}