{
  "cveId": "CVE-2026-118673",
  "url": "https://patchblox.com/security/cve/CVE-2026-118673",
  "summary": "CVE-2026-118673 is fixed in 2 products on 3 platforms, first by KeePassXC 2.8.0, released October 21, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "KeePassXC: Out-of-bounds write in browser integration response encryption with oversized database responses",
  "description": "KeePassXC is a cross-platform community-driven port of the Windows application KeePass Password Safe. From 2.3.0 until 2.8.0, KeePassXC browser integration encrypts authorized responses in src/browser/BrowserMessageBuilder.cpp using a fixed 1 MiB output vector even though Botan::Sodium::crypto_box_easy() writes the plaintext length plus crypto_box_MACBYTES. A browser-protocol client that can access the per-user IPC endpoint, has a valid database association, and causes an unlocked database to generate and encrypt a sufficiently large authorized response can trigger a sequential out-of-bounds write before any response is delivered. This issue is fixed in version 2.8.0.",
  "published": "2026-10-29T16:18:03Z",
  "severity": "",
  "cvss": 4.1,
  "cwe": "CWE-787: Out-of-bounds Write",
  "epss": 0.00115,
  "epssPercentile": 0.01552,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://nvd.nist.gov/vuln/detail/CVE-2026-118673",
  "fixes": [
    {
      "platform": "windows-app",
      "product": "KeePassXC",
      "fixedVersion": "2.8.0",
      "fix": "KeePassXC 2.8.0",
      "url": "https://patchblox.com/security/fix/windows-app/keepassxcteam.keepassxc-2.8.0",
      "released": "2026-10-21T00:00:00Z"
    },
    {
      "platform": "macos",
      "product": "KeePassXC",
      "fixedVersion": "2.8.0",
      "fix": "KeePassXC 2.8.0",
      "url": "https://patchblox.com/security/fix/macos/org.keepassxc.keepassxc-2.8.0",
      "released": "2026-10-23T17:03:13Z"
    },
    {
      "platform": "linux",
      "product": "keepassxc",
      "release": "Debian 14",
      "fixedVersion": "2.8.0\u002Bdfsg1-1",
      "fix": "DEBIAN-CVE-2026-118673",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-118673",
      "released": "2026-11-04T19:14:43Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}