RCE in 0x4m4 Hexstrike Ai
CVE-2025-35028
By providing a command-line argument starting with a semi-colon ; to an API endpoint created by the EnhancedCommandExecutor class of the HexStrike AI MCP server, the resultant composed command is executed directly in the context of the MCP server’s normal privilege; typically, this is root. There is no attempt to sanitize these arguments in the default configuration of this MCP server at the affected version (as of commit 2f3a5512 in September of 2025).
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.052 (91.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
Affected products
- 0x4m4 Hexstrike Ai — versions 33267047667b9accfbf0fdac1c1c7ff12f3a5512
Weakness classification (CWE)
References
- cve@takeonme.org (technical-description, exploit, third-party-advisory)
- cve@takeonme.org (issue-tracking)
Frequently asked questions
- What is CVE-2025-35028?
- CVE-2025-35028 is a critical-severity vulnerability in 0x4m4 Hexstrike Ai, classified under OS Command Injection. CVSS score: 9.1/10. Published 2025-11-30.
- How severe is CVE-2025-35028?
- Critical severity. CVSS v3 base score is 9.1 out of 10.