CVE-2026-42853Public exploit

Arbitrary command execution via unescaped password input

Published Jun 12, 2026 · Updated Jun 12, 2026

OS command injection in @apostrophecms/cli 3.6.0 and earlier allows local users to execute arbitrary commands through apos create. In lib/commands/create.js, exec() interpolates the password response into an echo pipeline without validation, sanitization, or escaping, so shell metacharacters alter the command. Exploitation requires a high-privileged local user to supply the crafted password during apos create, and injected commands inherit the CLI user's privileges.

CVSS severity6.5
Medium
EPSS probability0.43%
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 @apostrophecms/cli 3.6.0 and earlier allows local users to execute arbitrary commands through apos create. In lib/commands/create.js, exec() interpolates the password response into an echo pipeline without validation, sanitization, or escaping, so shell metacharacters alter the command. Exploitation requires a high-privileged local user to supply the crafted password during apos create, and injected commands inherit the CLI user's privileges.

The record

CVE
CVE-2026-42853
Published
Jun 12, 2026
Updated
Jun 12, 2026
Vendor
ApostropheCMS
Product
@apostrophecms/cli
Classifications
CWE-78, T1059
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jun 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 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=<= 3.6.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

ApostropheCMS · @apostrophecms/cliversion=<= 3.6.0

Published CVSS scores

6.5GitHub CNACVSS:3.1/AV:L/AC:L/PR:H/UI:R/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

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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