CVE-2026-43990

Local command execution via shell-wrapped arguments

Published May 12, 2026 · Updated May 12, 2026

OS command injection in JunoClaw before 0.x.y-security-1 allows local users to execute commands through agent-supplied arguments. plugin-shell's run_command passes the complete argument string through sh -c or cmd /C, causing shell metacharacters to be parsed as command syntax. An attacker must be able to supply a command to the local agent runtime; injected commands execute with the JunoClaw process's host privileges.

CVSS severity8.4
High
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in JunoClaw before 0.x.y-security-1 allows local users to execute commands through agent-supplied arguments. plugin-shell's run_command passes the complete argument string through sh -c or cmd /C, causing shell metacharacters to be parsed as command syntax. An attacker must be able to supply a command to the local agent runtime; injected commands execute with the JunoClaw process's host privileges.

The record

CVE
CVE-2026-43990
Published
May 12, 2026
Updated
May 12, 2026
Vendor
Dragonmonk111
Product
JunoClaw
Classifications
CWE-77, CWE-78, T1059.004, T1059.003
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 12, 2026CVE publishedPublication date reported by the CVE source.
  2. May 12, 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=< v0.x.y-security-1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Dragonmonk111 · JunoClawversion=< v0.x.y-security-1

Published CVSS scores

8.4GitHub, Inc.CVSS:3.1/AV:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix Shell
T1059.003Windows Command Shell

Public exploit references

No public exploit references are available in this record.

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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