{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:dolibarr:dolibarr_erp\\/crm:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "9.0.0"
              },
              {
                "fixed": "24.0.0"
              }
            ],
            "source": [
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "ae81bbac935afc0013ce99c87e3f2c356d1861fb"
            },
            {
              "fixed": "769c7db907099643558e77d7002c109cfda919e5"
            },
            {
              "fixed": "264a44defb5e438689c75679617f6edc4c038abc"
            }
          ],
          "repo": "https://github.com/dolibarr/dolibarr",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-22"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81730.json"
  },
  "details": "Dolibarr 9.0.0 through 23.0.4 saves inbound email attachments under the name supplied in the message's MIME headers without reducing it to a safe basename. The global saveAttachment() in htdocs/emailcollector/lib/emailcollector.lib.php builds $filepath = $path . $filename . '.' . $ext and hands it to file_put_contents(), and the private saveAttachment() in htdocs/emailcollector/class/emailcollector.class.php writes to $destdir.'/'.$filename; the name reaches both from the attachment's own getName() or getFilename() value by way of the record-join, create-ticket and create-project operations. A traversal sequence in the filename therefore survives intact, so any sender who can email a mailbox that an EmailCollector monitors, which is the module's ordinary use for a support or ticket inbox, can place attacker-controlled content outside the per-object attachment directory without holding a Dolibarr account. Under the hardened layout Dolibarr's SECURITY.md requires, with htdocs read-only, the write is confined to the documents tree and corrupts or forges other objects' documents; where htdocs is writable the same primitive reaches a web-executable path. Version 24.0.0 applies dol_sanitizePathName() and dol_sanitizeFileName() before the write.",
  "id": "CVE-2026-81730",
  "modified": "2026-09-02T03:30:56.533628435Z",
  "published": "2026-08-27T20:07:34.881Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81730.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-81730"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/dolibarr-9.0.0-through-23.0.4-path-traversal-via-emailcollector-attachment-filename"
    },
    {
      "type": "FIX",
      "url": "https://github.com/Dolibarr/dolibarr/commit/264a44defb5e438689c75679617f6edc4c038abc"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/Dolibarr/dolibarr"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/Dolibarr/dolibarr/blob/23.0.4/htdocs/emailcollector/lib/emailcollector.lib.php#L187"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Dolibarr 9.0.0 through 23.0.4 Path Traversal via EmailCollector Attachment Filename"
}