OS Command Injection Vulnerability in 0x4m4 HexStrike AI API Tools Endpoint
CVE-2026-90690

6.9MEDIUM

Key Information:

Vendor

0x4m4

Status
Hexstrike Ai
Vendor
CVE Published:
14 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-90690?

A vulnerability exists in the 0x4m4 HexStrike AI API Tools Endpoint due to improper handling of arguments within the subprocess.Popen function in hexstrike_server.py. Attackers can exploit this weakness to execute arbitrary OS commands remotely by manipulating various input parameters such as additional_args, target, username, password, scan_type, and payload. The exploit is publicly available, making it crucial for users to be aware and take preventive measures. The vendor is actively working on a patch to address this vulnerability.

Affected Version(s)

HexStrike AI d689933ff579d839c676c82b231f8e98326c5f04

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-90690 - Proof of Concept

References

https://vuldb.com/vuln/403223
vdb-entrytechnical-description
https://vuldb.com/vuln/403223/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-90690
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

ez-lbz (VulDB User)
VulDB CNA Team
.