High severity · published Jun 5, 2026
CVE-2026-46391
HAX open-apis: Credential Theft via Server-Side Request Forgery (SSRF) in open-apis
8.7
CVSS
0.5%
EPSS
No
On KEV
Description
HAX CMS helps manage microsite universe with PHP or NodeJs backends. Starting in version 9.0.1 and prior to version 26.0.0 of @haxtheweb/open-apis, multiple functions conduct substring-only matching to validate hostnames to which basic authorization should be sent. An attacker can append the matched substrings to an attacker-controlled endpoint and capture authentication. Version 26.0.0 fixes the issue.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HA
@haxtheweb/open-apis · haxtheweb
>= 9.0.1, < 26.0.0 · source: vendor