Critical severity · published Jun 5, 2026
CVE-2026-46399
Authenticated Remote Code Execution via File Overwrite
9.4
CVSS
0.3%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 22% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HA
haxcms-nodejs · haxtheweb
< 26.0.0 · source: vendor
HA
haxcms-php · haxtheweb
< 26.0.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-46399
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-46399
github.com
https://github.com/haxtheweb/issues/security/advisories/GHSA-q759-vxg8-vq5j
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