High severity · published Sep 14, 2026
CVE-2026-90690
0x4m4 HexStrike AI API Tools Endpoint hexstrike_server.py subprocess.Popen os command injection
7.3
CVSS
2.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.1% · higher than 82% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HA
HexStrike AI · 0x4m4
d689933ff579d839c676c82b231f8e98326c5f04 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-90690
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-90690
github.com
https://github.com/0x4m4/hexstrike-ai/issues/224
github.com
https://github.com/0x4m4/hexstrike-ai/pull/266
vuldb.com
https://vuldb.com/cve/CVE-2026-90690
vuldb.com
https://vuldb.com/submit/914892
vuldb.com
https://vuldb.com/vuln/403223
vuldb.com
https://vuldb.com/vuln/403223/cti
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