CVE-2026-76230Public exploit

Arbitrary command execution via unquoted npm install arguments

Published Aug 19, 2026 · Updated Aug 19, 2026

Command injection in npm lock maintenance in Mend.io Renovate before 40.33.0 allows attackers to execute commands via crafted package names. In lib/modules/manager/npm/post-update/npm.ts, workspace names and generated package keys are appended to npm install updateCmd strings without shlex quote escaping, so shell metacharacters in overridePackageName-influenced input reach command execution. Exploitation requires repository write access and a malicious Renovate configuration during lock file maintenance, and the result is code execution on the machine running Renovate.

CVSS severity6.7
Medium
EPSS probability0.92%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in npm lock maintenance in Mend.io Renovate before 40.33.0 allows attackers to execute commands via crafted package names. In lib/modules/manager/npm/post-update/npm.ts, workspace names and generated package keys are appended to npm install updateCmd strings without shlex quote escaping, so shell metacharacters in overridePackageName-influenced input reach command execution. Exploitation requires repository write access and a malicious Renovate configuration during lock file maintenance, and the result is code execution on the machine running Renovate.

The record

CVE
CVE-2026-76230
Published
Aug 19, 2026
Updated
Aug 19, 2026
Vendor
Mend.io
Product
Renovate
Classifications
CWE-77, T1059.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 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=35.63.0 <40.33.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Mend.io · Renovateversion=35.63.0 <40.33.0

Published CVSS scores

6.7GitHubCVSS:3.1/AV:L/AC:L/PR:H/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('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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