{"id":"CVE-2026-81730","summary":"Dolibarr 9.0.0 through 23.0.4 Path Traversal via EmailCollector Attachment Filename","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.","modified":"2026-09-02T03:47:24.421795888Z","published":"2026-08-27T20:07:34.881Z","database_specific":{"cwe_ids":["CWE-22"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81730.json","cna_assigner":"VulnCheck"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/dolibarr/dolibarr","events":[{"introduced":"ae81bbac935afc0013ce99c87e3f2c356d1861fb"},{"fixed":"769c7db907099643558e77d7002c109cfda919e5"},{"fixed":"264a44defb5e438689c75679617f6edc4c038abc"}],"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"]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-81730.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","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"}]}