{
  "cveId": "CVE-2026-87766",
  "url": "https://patchblox.com/security/cve/CVE-2026-87766",
  "summary": "CVE-2026-87766 is fixed in 3 products on 1 platform, first by RHSA-2026:85312, released September 9, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Bubblewrap: bubblewrap: symlink traversal via /oldroot allows writing files outside sandbox during setup",
  "description": "A flaw was found in bubblewrap. During sandbox setup, creating files or directories under the new root can follow a parent symlink onto the host via /oldroot, writing attacker-chosen paths outside the sandbox as the launching user. This happens before the sandboxed process starts. This issue is GHSA-pxhw-h44j-8pfx. It is fixed in bubblewrap 0.12.0.",
  "published": "2026-09-09T00:00:00Z",
  "severity": "Important",
  "cvss": 8.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
  "cwe": "Improper Link Resolution Before File Access (\u0027Link Following\u0027)",
  "epss": 0.00211,
  "epssPercentile": 0.11467,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-87766",
  "fixes": [
    {
      "platform": "linux",
      "product": "bubblewrap",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "0.12.0-1~deb13u1",
      "fix": "DEBIAN-CVE-2026-87766",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-87766",
      "released": "2026-09-10T12:12:19Z"
    },
    {
      "platform": "linux",
      "product": "bubblewrap",
      "release": "Debian 14",
      "fixedVersion": "0.12.0-1",
      "fix": "DEBIAN-CVE-2026-87766",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-87766",
      "released": "2026-09-10T12:12:19Z"
    },
    {
      "platform": "linux",
      "product": "bubblewrap",
      "release": "RHEL 10",
      "fixedVersion": "0.10.0-3.el10_0.4",
      "fix": "RHSA-2026:85312",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-85312",
      "released": "2026-09-09T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "bubblewrap",
      "release": "RHEL 8",
      "fixedVersion": "0:0.4.0-3.el8_10",
      "fix": "RHSA-2026:85306",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-85306",
      "released": "2026-10-20T16:42:02Z"
    },
    {
      "platform": "linux",
      "product": "bubblewrap",
      "release": "RHEL 9",
      "fixedVersion": "0:0.6.3-1.el9_8.1",
      "fix": "RHSA-2026:85309",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-85309",
      "released": "2026-10-20T16:43:36Z"
    },
    {
      "platform": "linux",
      "product": "bubblewrap",
      "release": "almalinux 10",
      "fixedVersion": "0.10.0-5.el10_2",
      "fix": "ALSA-2026:85308",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-85308",
      "released": "2026-11-07T00:40:04Z"
    },
    {
      "platform": "linux",
      "product": "bubblewrap",
      "release": "almalinux 8",
      "fixedVersion": "0.4.0-3.el8_10",
      "fix": "ALSA-2026:85306",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-85306",
      "released": "2026-11-07T00:40:18Z"
    },
    {
      "platform": "linux",
      "product": "bubblewrap",
      "release": "almalinux 9",
      "fixedVersion": "0.6.3-1.el9_8.1",
      "fix": "ALSA-2026:85309",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-85309",
      "released": "2026-11-07T00:41:11Z"
    },
    {
      "platform": "linux",
      "product": "bubblewrap",
      "release": "amzn 2023",
      "fixedVersion": "0.12.0-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-3105",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3105",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "bubblewrap",
      "release": "ol 10",
      "fixedVersion": "0:0.10.0-5.el10_2",
      "fix": "ELSA-2026-85308",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-85308",
      "released": "2026-11-07T00:59:15Z"
    },
    {
      "platform": "linux",
      "product": "bubblewrap",
      "release": "ol 8",
      "fixedVersion": "0:0.4.0-3.el8_10",
      "fix": "ELSA-2026-85306",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-85306",
      "released": "2026-11-07T00:48:28Z"
    },
    {
      "platform": "linux",
      "product": "bubblewrap",
      "release": "ol 9",
      "fixedVersion": "0:0.6.3-1.el9_8.1",
      "fix": "ELSA-2026-85309",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-85309",
      "released": "2026-11-07T00:52:27Z"
    },
    {
      "platform": "linux",
      "product": "bubblewrap",
      "release": "rocky 10",
      "fixedVersion": "0:0.10.0-5.el10_2",
      "fix": "RLSA-2026:85308",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-85308",
      "released": "2026-11-07T00:39:51Z"
    },
    {
      "platform": "linux",
      "product": "bubblewrap",
      "release": "rocky 8",
      "fixedVersion": "0:0.4.0-3.el8_10",
      "fix": "RLSA-2026:85306",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-85306",
      "released": "2026-11-07T00:39:57Z"
    },
    {
      "platform": "linux",
      "product": "bubblewrap",
      "release": "rocky 9",
      "fixedVersion": "0:0.6.3-1.el9_8.1",
      "fix": "RLSA-2026:85309",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-85309",
      "released": "2026-11-07T00:39:57Z"
    },
    {
      "platform": "linux",
      "product": "bubblewrap-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "0.12.0-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-3105",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3105",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "bubblewrap-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "0.12.0-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-3105",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3105",
      "released": "2026-09-28T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}