CVE-2026-5602Public exploit

Local command execution via interpolated tool arguments

Published Apr 5, 2026 · Updated Apr 5, 2026

OS command injection in Nor2-io Heim MCP 0.1.3 and earlier allows local users to execute shell commands through crafted tool inputs. The registerTools handlers interpolate path, specification, name, version, language, and base-path values into strings passed to child_process.exec. Code runs with the MCP server process privileges when a local user or locally configured AI agent invokes an affected creation or deployment tool.

CVSS severity5.3
Medium
EPSS probability0.89%
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 Nor2-io Heim MCP 0.1.3 and earlier allows local users to execute shell commands through crafted tool inputs. The registerTools handlers interpolate path, specification, name, version, language, and base-path values into strings passed to child_process.exec. Code runs with the MCP server process privileges when a local user or locally configured AI agent invokes an affected creation or deployment tool.

The record

CVE
CVE-2026-5602
Published
Apr 5, 2026
Updated
Apr 5, 2026
Vendor
Nor2-io
Product
Heim MCP
Classifications
CWE-77, CWE-78, T1059.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0.1.0
  2. Affected versionversion=0.1.1
  3. Affected versionversion=0.1.2
  4. Affected versionversion=0.1.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Nor2-io · Heim MCPversion=0.1.0; version=0.1.1; version=0.1.2; version=0.1.3

Published CVSS scores

1.9VulDBCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
5.3VulDBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
4.3VulDBAV:L/AC:L/Au:S/C:P/I:P/A:P

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

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

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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