CVE-2026-46396: Stored XSS via <iframe> in HAX CMS allows access to sensitive client-side data and account takeover

May 19, 2026 (updated June 9, 2026)

A stored cross-site scripting (XSS) vulnerability exists in HAX CMS due to improper sanitization of <iframe> elements.

The application allows javascript: URIs in the src attribute, which are executed when a malicious page is viewed. This enables attackers to execute arbitrary JavaScript in the context of the victim’s browser and access sensitive data exposed to client-side scripts.

References

github.com/advisories/GHSA-jh3h-rpxg-fr36
github.com/haxtheweb/issues/security/advisories/GHSA-jh3h-rpxg-fr36
nvd.nist.gov/vuln/detail/CVE-2026-46396

Code Behaviors & Features

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