Vulnerability · Published Jun 5, 2026 · Assigned by GitHub_M

CVE-2026-46399Authenticated Remote Code Execution via File Overwrite

Critical 9.4

In plain English

A critical-severity OS command injection in haxcms-nodejs from haxtheweb. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).

Severity (CVSS 4.0)9.4Critical

Exploit odds (30 days)0.3%top 78.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
haxtheweb	haxcms-nodejs	< 26.0.0
haxtheweb	haxcms-php	< 26.0.0

Weakness: CWE-15, CWE-73, CWE-78 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

References

https://github.com/haxtheweb/issues/security/advisories/GHSA-q759-vxg8-vq5j x_refsource_CONFIRM