CVE-2026-90690 0x4m4 HexStrike AI API Tools Endpoint hexstrike_server.py subprocess.Popen os command injection
Remote attackers can execute arbitrary OS commands via API parameters in HexStrike AI, requiring immediate patching.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-90690?
CVE-2026-90690 is a medium-severity command injection vulnerability in 0x4m4 HexStrike AI, published on 14 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A weakness has been identified in 0x4m4 HexStrike AI up to d689933ff579d839c676c82b231f8e98326c5f04. The affected element is the function subprocess.Popen of the file hexstrike_server.py of the component API Tools Endpoint. Executing a manipulation of the argument additional_args/target/username/password/scan_type/payload can lead to os command injection. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks. This product does not use versioning. This is why information about affected and unaffected releases are unavailable. A fix appears to be in progress.
Which versions are affected by CVE-2026-90690?
How do I fix CVE-2026-90690?
No fix has been published for CVE-2026-90690 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-90690 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90690 exists.
Sources
Also known as GHSA-7qpm-mq3q-crwx.