CVE-2026-46399 Authenticated Remote Code Execution via File Overwrite
Authenticated attackers can achieve remote code execution on HAX CMS servers by configuring malicious Git filter commands via file overwrite.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-46399?
CVE-2026-46399 is a critical command injection 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. The PHP version of HAX CMS prior to version 26.0.0 has an authenticated file overwrite vulnerability. An attacker can exploit this vulnerability to configure malicious Git filter commands and achieve code execution on the HAX CMS server. Version 26.0.0 patches the issue.
Which versions are affected by CVE-2026-46399?
How do I fix CVE-2026-46399?
No fix has been published for CVE-2026-46399 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-2026-46399 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-46399 exists.