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CVE-2026-44522— Note Mark: Arbitrary File Write via Path Traversal in Asset Names Leading to Remote Code Execution

Quick assessment

Affected
enchant97 note-mark
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Note Mark是Leo Spratt个人开发者的一个基于网络的Markdown笔记应用程序。 Note Mark 0.13.0至0.19.4之前版本存在输入验证错误漏洞，该漏洞源于资产文件名未进行清理和验证，可能导致目录遍历攻击，写入任意文件。

AI Predicted 7.5 Difficulty: Easy EPSS 0.72% · P52

Affected Version Matrix 1

VendorProduct Version RangeStatus
enchant97 note-mark >= 0.13.0, < 0.19.4 affected
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I. Basic Information for CVE-2026-44522

Vulnerability Information
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Vulnerability Title
Note Mark: Arbitrary File Write via Path Traversal in Asset Names Leading to Remote Code Execution
Source: CVE Program / CVE List V5
Vulnerability Description
Note Mark is an open-source note-taking application. From 0.13.0 to before 0.19.4, the Note Mark application allows authenticated users to upload assets to notes via POST /api/notes/{noteID}/assets, where the asset filename is provided through the X-Name HTTP request header. This value is stored directly in the database without any sanitization or validation - no path separator filtering, no directory traversal sequence rejection, and no use of filepath.Base() to strip directory components. The unsanitized name is persisted as-is in the note_assets table (Name column, varchar(80)). When an administrator subsequently runs the data export CLI commands (note-mark migrate export-v1 or note-mark migrate export), the stored asset name is passed directly into filepath.Join() and path.Join() calls as part of the output file path argument to os.Create(). Since Go's filepath.Join() resolves ../ sequences during path normalization, an attacker-controlled asset name containing directory traversal sequences causes the export process to write files to arbitrary locations on the filesystem, completely outside the intended export directory. This vulnerability is fixed in 0.19.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Note Mark 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Note Mark是Leo Spratt个人开发者的一个基于网络的Markdown笔记应用程序。 Note Mark 0.13.0至0.19.4之前版本存在输入验证错误漏洞，该漏洞源于资产文件名未进行清理和验证，可能导致目录遍历攻击，写入任意文件。
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
enchant97 note-mark >= 0.13.0, < 0.19.4 -

II. Public POCs for CVE-2026-44522

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III. Intelligence Information for CVE-2026-44522

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Vendor Advisories for CVE-2026-44522 (1)

IV. Related Vulnerabilities

Same product: note-mark
Same vendor: enchant97
Same weakness: CWE-20

V. Comments for CVE-2026-44522

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