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CVE-2026-50553— Note Mark: Path traversal via unsanitized book/note slug in migrate export (sibling of GHSA-g49p)

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 是一款开源笔记应用。在 0.19.5 版本之前，Note Mark 使用 OpenAPI/huma 的标签模式 来验证“书籍”和“笔记”的 slug 值。huma 使用 编译该模式，并通过 进行测试，而这是一个未锚定（unanchored）的匹配。由于该模式缺少 和 锚点，只要字符串中包含任意一个由小写字母、数字或连字符组成的子串，即可通过验证。例如，类似 这样的 slug 会被接受并原样存储。数据导出 CLI 命令（ 和 ）会将这些未净化的 slug 直接通过 / 拼接到输出路径中，随后使用

CVSS 8.6 · High EPSS 0.06% · P19

Affected Version Matrix 1

VendorProduct Version RangeStatus
enchant97 note-mark < 0.19.5 affected
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I. Basic Information for CVE-2026-50553

Vulnerability Information
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Vulnerability Title
Note Mark: Path traversal via unsanitized book/note slug in migrate export (sibling of GHSA-g49p)
Source: CVE Program / CVE List V5
Vulnerability Description
Note Mark is an open-source note-taking application. Prior to version 0.19.5, Note Mark validates book and note slug values with the OpenAPI/huma tag pattern:"[a-z0-9-]+". huma compiles this with regexp.MustCompile(s.Pattern) and tests it with patternRe.MatchString(str), an UNANCHORED match. Because the pattern is not anchored (^...$), any string that merely CONTAINS one [a-z0-9-] substring passes validation. A slug such as ../../../../../../tmp/escape is accepted and stored verbatim. The data-export CLI commands (note-mark migrate export and note-mark migrate export-v1) join these unsanitized slugs straight into the output path with path.Join / filepath.Join, then os.MkdirAll the directory and os.Create the note file. path.Join resolves the ../ segments, so the note content file is written OUTSIDE the configured export directory. The export process commonly runs as root (default in Docker / bare-metal admin usage), so this is a root-privilege arbitrary directory create + file write. This issue has been patched in version 0.19.5.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
enchant97 note-mark < 0.19.5 -

II. Public POCs for CVE-2026-50553

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III. Intelligence Information for CVE-2026-50553

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Patches & Fixes for CVE-2026-50553 (1)

Vendor Advisories for CVE-2026-50553 (1)

Vendor Pages for CVE-2026-50553 (1)

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-50553

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