xdg-dbus-proxy has an eavesdrop filter bypass allowing message interception

{
  "id": "5a12486e5ab1f87a12e90b105413fc164de00b99fbfdfa626d7124df37f93a51",
  "url": "https://osv.dev/vulnerability/CVE-2026-34080",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "xdg-dbus-proxy has an eavesdrop filter bypass allowing message interception",
    "summary": "xdg-dbus-proxy is a filtering proxy for D-Bus connections. Prior to 0.1.7, a policy parser vulnerability allows bypassing eavesdrop restrictions. The proxy checks for eavesdrop=true in policy rules but fails to handle eavesdrop ='true' (with a space before the equals sign) and similar cases. Clients can intercept D-Bus messages they should not have access to. This vulnerability is fixed in 0.1.7.",
    "evidence": "osv:CVE-2026-34080",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-34080",
      "aliases": [
        "CVE-2026-34080",
        "GHSA-vjp5-hjfm-7677"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/flatpak/xdg-dbus-proxy",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "6a170fa77e3cbecb48f9dd2478fe5c0a119eb467"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.1.7"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "cpe": "cpe:2.3:a:flatpak:xdg-dbus-proxy:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.1.7"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.1.6",
            "0.1.5",
            "0.1.4",
            "0.1.3",
            "0.1.2",
            "0.1.1",
            "0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34080.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:52.532211365Z",
      "provider": "osv",
      "references": [
        "https://lists.debian.org/debian-lts-announce/2026/04/msg00022.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34080.json",
        "https://github.com/flatpak/xdg-dbus-proxy/security/advisories/GHSA-vjp5-hjfm-7677",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-34080"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-1289"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34080.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-34080",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 521190,
  "published_at": "2026-04-07T20:57:57.931+00:00"
}