Affected versions of `serve` do not properly handle `%2e` (.) and `%2f` (/) characters, and allow the, characters to be used in paths. This can be used to traverse the directory tree and list content of any directory the user running the process has access to.

Mitigating factors:
This vulnerability only allows listing of directory contents and does not allow reading of arbitrary files.

## Recommendation

Update to version 6.4.9 later.

Affected Packages

npm serve

Affected versions: 0 (fixed in 6.4.9)

Related CVEs

CVE-2018-3712

Key Information

GHSA ID

GHSA-q2qh-cgc2-qhr3

Published

July 27, 2018 5:07 PM

Last Modified

April 21, 2023 7:00 PM

CVSS Score

5.0 /10

Primary Ecosystem

npm

Primary Package

serve

GitHub Reviewed

✓ Yes

Dataset

Last updated: July 2, 2025 6:26 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.