CVE-2026-42853 @apostrophecms/cli: Command Injection in apos create via Unsanitized Password Input
Attackers can execute arbitrary commands on the host system via unsanitized password input in the ApostropheCMS CLI create command.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-42853?
CVE-2026-42853 is a medium-severity command injection vulnerability in @apostrophecms/cli, published on 12 Jun 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
ApostropheCMS is an open-source Node.js content management system. Versions of the @apostrophecms/cli package up to and including 3.6.0 contain a command injection vulnerability in the apos create command. User-supplied input from the password prompt is embedded directly into a shell command without proper sanitization or escaping. This allows execution of arbitrary commands on the host system. As of time of publication, no known patched versions are available.
Weakness: CWE-78
Which versions are affected by CVE-2026-42853?
2 open source packages ship an affected version, including @apostrophecms/cli.
| Package | Affected | Fixed in |
|---|---|---|
@apostrophecms/cli npm | All versions to 3.6.0 | None |
@apostrophecms/cli npm | All versions to 3.6.0 | None |
How do I fix CVE-2026-42853?
No fix has been published for CVE-2026-42853 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-42853 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-42853 exists.
Sources
Also known as GHSA-hcwq-x9fw-8cfq.