CVE-2026-54053 Many Notes: Path Traversal via ZIP import allows arbitrary file write and stored XSS in other users' vaults
Authenticated users can exploit path traversal in ZIP imports to write arbitrary files and inject stored XSS into other users' vaults.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-54053?
CVE-2026-54053 is a critical path traversal vulnerability in brufdev many-notes, published on 17 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
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.
Weakness: CWE-22
Which versions are affected by CVE-2026-54053?
How do I fix CVE-2026-54053?
No fix has been published for CVE-2026-54053 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-54053 being exploited?
There is no known exploitation of CVE-2026-54053 in the wild and no public exploit code.
Sources
Also known as GHSA-wg8j-9c2g-xh6r.