{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.1.9"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "72b40c8f6d9d585cfbdb249690724f740d207087"
            },
            {
              "fixed": "e4465a0dfe96da3b39929a30a1ac3a22b16223e3"
            },
            {
              "fixed": "e5702fca4dba9600721921fbca2dbc39dc5ca400"
            },
            {
              "fixed": "fc027f759316fb2a6c45648200b6f100202eb84e"
            }
          ],
          "repo": "https://github.com/flatpak/xdg-dbus-proxy",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-2cgv-pwcq-wvpq"
  ],
  "database_specific": {
    "cna_assigner": "redhat",
    "cwe_ids": [
      "CWE-290"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/94xxx/CVE-2026-94422.json"
  },
  "details": "An incorrect implementation of message filtering in xdg-dbus-proxy versions before 0.1.9 allows an attacker to bypass the intended message filtering on the D-Bus session bus by setting a reply serial number on non-reply messages. A malicious or compromised Flatpak app could use this to achieve arbitrary code execution outside its sandbox. xdg-dbus-proxy was designed to be part of the sandbox boundary for Flatpak, but it is released as a separate project and is sometimes used by other app frameworks such as Firejail.",
  "id": "CVE-2026-94422",
  "modified": "2026-10-04T02:30:37.069981207Z",
  "published": "2026-10-02T13:54:10.589Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/09/23/5"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/downloads/content/package-browser/"
    },
    {
      "type": "WEB",
      "url": "https://bodhi.fedoraproject.org/updates/?packages=xdg-dbus-proxy"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/security/cve/CVE-2026-94422"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/94xxx/CVE-2026-94422.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/flatpak/xdg-dbus-proxy/security/advisories/GHSA-2cgv-pwcq-wvpq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-94422"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2542235"
    },
    {
      "type": "FIX",
      "url": "https://github.com/flatpak/xdg-dbus-proxy/commit/e4465a0dfe96da3b39929a30a1ac3a22b16223e3"
    },
    {
      "type": "FIX",
      "url": "https://github.com/flatpak/xdg-dbus-proxy/commit/e5702fca4dba9600721921fbca2dbc39dc5ca400"
    },
    {
      "type": "FIX",
      "url": "https://github.com/flatpak/xdg-dbus-proxy/commit/fc027f759316fb2a6c45648200b6f100202eb84e"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/flatpak/xdg-dbus-proxy"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "xdg-dbus-proxy: message filtering bypass via reply serial allows sandbox escape"
}