CVE-2026-46357 HAX CMS NodeJS application Vulnerable to Denial of Service using Malicious Import Request
An authenticated attacker can crash the HAX CMS NodeJS application by sending a malicious site creation request, requiring a manual restart.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-46357?
CVE-2026-46357 is a medium-severity denial of service vulnerability in haxtheweb haxcms-nodejs, published on 5 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
HAX CMS helps manage microsite universe with PHP or NodeJs backends. Prior to version 26.0.0, the HAX CMS NodeJS application crashes when an authenticated attacker sends a specially crafted site creation request to the createSite endpoint. A single request is sufficient to take the entire application offline, requiring a manual server restart to restore service. Version 26.0.0 fixes the issue.
Weakness: CWE-20
Which versions are affected by CVE-2026-46357?
2 open source packages ship an affected version, including @haxtheweb/haxcms-nodejs.
| Package | Affected | Fixed in |
|---|---|---|
@haxtheweb/haxcms-nodejs npm | All versions | 26.0.0 |
@haxtheweb/haxcms-nodejs npm | All versions | 26.0.0 |
How do I fix CVE-2026-46357?
Upgrade @haxtheweb/haxcms-nodejs to 26.0.0 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-46357 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-46357 exists.
Sources
Also known as GHSA-9r33-xhw8-4qqp.