What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-07-10 · updated 2026-06-17
• Weakness: CWE-78

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.

Affected products

• meshtastic firmware: before 2.6.6 — fixed in 2.6.6

How to fix

Upgrade to a fixed version: meshtastic firmware 2.6.6. Check the vendor advisory for mitigations.

References

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

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