Vulnerability · Published Sep 17, 2026 · Assigned by GitHub_M
CVE-2026-54053Many Notes: Path Traversal via ZIP import allows arbitrary file write and stored XSS in other users' vaults
Critical 9.6
In plain English
A critical-severity path traversal in many-notes from brufdev. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities).
Official description
Many Notes is a Markdown note-taking web application designed for simplicity. Prior to 0.16.0, the ZIP vault import implemented in app/Actions/ProcessImportedVault.php accepts archive filenames containing parent-directory traversal segments. An authenticated user can write arbitrary files outside the importing user's vault and into other users' vaults, including overwriting existing files. Disguised SVG content can be placed in another user's vault and execute stored cross-site scripting when the victim opens that vault. This issue is fixed in version 0.16.0.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| brufdev | many-notes | < 0.16.0 |
Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N