SEPTEMBER 17, 2026
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Case File

CVE-2026-81730

HIGH · CVSS 8.2 EPSS 0.38% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-27 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

Dolibarr versions 9.0.0 through 23.0.4 are vulnerable due to improper handling of inbound email attachment filenames, allowing attackers to exploit directory traversal vulnerabilities and write files outside the intended directory. This can lead to unauthorized access or corruption of files, particularly affecting systems with writable htdocs directories. Organizations using affected Dolibarr versions, especially those managing support or ticket inboxes, should prioritize applying the update to version 24.0.0 or later to mitigate this risk.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

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CVE
CVE-2026-81730
Severity
HIGH
CVSS
8.2
EPSS
0.38%

Original NVD Description

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.

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