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CVE-2026-81730— Dolibarr 9.0.0 through 23.0.4 Path Traversal via EmailCollector Attachment Filename

Quick assessment

Affected
Dolibarr dolibarr
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Dolibarr是Dolibarr基金会开源的一款企业资源计划软件。 Dolibarr 9.0.0版本至23.0.4版本存在路径遍历漏洞，该漏洞源于对邮件附件文件名处理不当，导致路径遍历，攻击者可能无需账户即可将攻击者控制的内容写入附件目录之外，破坏或伪造其他对象的文档，在htdocs可写时可能导致任意代码执行。

CVSS 8.2 · High EPSS 0.56% · P45

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
Dolibarr dolibarr 9.0.0< 24.0.0 affected
24.0.0 unaffected
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I. Basic Information for CVE-2026-81730

Vulnerability Information
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Vulnerability Title
Dolibarr 9.0.0 through 23.0.4 Path Traversal via EmailCollector Attachment Filename
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Dolibarr 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Dolibarr是Dolibarr基金会开源的一款企业资源计划软件。 Dolibarr 9.0.0版本至23.0.4版本存在路径遍历漏洞，该漏洞源于对邮件附件文件名处理不当，导致路径遍历，攻击者可能无需账户即可将攻击者控制的内容写入附件目录之外，破坏或伪造其他对象的文档，在htdocs可写时可能导致任意代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Dolibarr dolibarr 9.0.0 ~ 24.0.0 -

II. Public POCs for CVE-2026-81730

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
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claude_code · 4315 chars
GitHub 复现环境（可 clone 直接跑）
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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III. Intelligence Information for CVE-2026-81730

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Patches & Fixes for CVE-2026-81730 (1)

Vendor Advisories for CVE-2026-81730 (1)

Vendor Pages for CVE-2026-81730 (1)

Same Patch Batch · Dolibarr · 2026-08-27 · 3 CVEs total

CVE-2026-81728 8.1 HIGH Dolibarr before 24.0.0 SQL Injection via the CSV and XLSX Import Update Keys
CVE-2026-81729 6.5 MEDIUM Dolibarr before 23.0.4 Incorrect Authorization on REST API Document Deletion

IV. Related Vulnerabilities

Same product: dolibarr
Same vendor: Dolibarr
Same weakness: CWE-22

V. Comments for CVE-2026-81730

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