CVE-2026-90690Public exploitNetwork attack vectorHinoki check available

Unauthenticated command execution via shell-backed API parameters

Published Sep 14, 2026 · Updated Sep 14, 2026

OS command injection in HexStrike AI at commit d689933 allows remote attackers to execute commands through API tool parameters. API handlers append fields such as additional_args, target, or payload to shell command strings passed to subprocess.Popen with shell=True. The server must be network-reachable; injected commands run with its process privileges and can read or alter host data or interrupt service.

CVSS severity9.8
Critical
EPSS probability1.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

OS command injection in HexStrike AI at commit d689933 allows remote attackers to execute commands through API tool parameters. API handlers append fields such as additional_args, target, or payload to shell command strings passed to subprocess.Popen with shell=True. The server must be network-reachable; injected commands run with its process privileges and can read or alter host data or interrupt service.

The record

CVE
CVE-2026-90690
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
0x4m4
Product
HexStrike AI
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=d689933ff579d839c676c82b231f8e98326c5f04

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

0x4m4 · HexStrike AIversion=d689933ff579d839c676c82b231f8e98326c5f04

Published CVSS scores

9.8ez-lbzCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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