Is CVE-2026-90690 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-90690 being exploited in the wild.

How severe is CVE-2026-90690?

High severity, with a CVSS score of 7.3, published 14 September 2026.

Which products and versions are affected?

0x4m4 HexStrike AI up to commit d689933ff579d839c676c82b231f8e98326c5f04.

Is there a fix for CVE-2026-90690?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-90690 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-90690?

Check whether you run 0x4m4 HexStrike AI at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-90690: 0x4m4 HexStrike AI command injection in API Tools Endpoint

CVE-2026-90690 · Severity: high · CVSS 7.3 · Published 2026-09-14

HexStrike AI is an open-source security testing tool that provides a suite of hacking and penetration testing utilities via a web API. A command injection vulnerability in over 90 API endpoints allows remote attackers to execute arbitrary operating system commands by manipulating input parameters such as additional_args, target, username, password, scan_type, and payload. An attacker can exploit this to gain full system control and potentially compromise the security infrastructure relying on this tool.

Technologies: 0x4m4 HexStrike AI. Vendors: 0x4m4.

Quick answers

Is CVE-2026-90690 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-90690 being exploited in the wild.
How severe is CVE-2026-90690?: High severity, with a CVSS score of 7.3, published 14 September 2026.
Which products and versions are affected?: 0x4m4 HexStrike AI up to commit d689933ff579d839c676c82b231f8e98326c5f04.
Is there a fix for CVE-2026-90690?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-90690 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-90690?: Check whether you run 0x4m4 HexStrike AI at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is a classic OS command injection flaw in the subprocess.Popen call within hexstrike_server.py's API Tools Endpoint. The vulnerable component fails to properly sanitize or escape user-supplied arguments (additional_args, target, username, password, scan_type, payload) before passing them to subprocess.Popen, allowing attackers to break out of intended command syntax and inject arbitrary shell commands. The attack is network-reachable with no authentication required. A successful exploit results in remote code execution with the privileges of the application process. A fix is in progress via pull request #266 on the GitHub repository.

Affected products

0x4m4 HexStrike AI up to commit d689933ff579d839c676c82b231f8e98326c5f04

Timeline

2026-09-14: disclosed: CVE-2026-90690 published
2026-09-09: other: Fix pull request #266 submitted

References

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