Vulnerability · Published Jun 5, 2026 · Assigned by GitHub_M
CVE-2026-46396HAX CMS has a stored XSS via <iframe> that allows access to sensitive client-side data and account takeover
Critical 9.3
In plain English
A critical-severity cross-site scripting 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 0.2% (higher than 14% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
HAX CMS helps manage microsite universe with PHP or NodeJs backends. A stored cross-site scripting (XSS) vulnerability exists in versions prior to 26.0.0 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. Version 26.0.0 fixes the issue.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | @haxtheweb/haxcms-nodejs | 26.0.0 | GHSA-jh3h-rpxg-fr36 |
| npm | @haxtheweb/iframe-loader | 26.0.0 | GHSA-jh3h-rpxg-fr36 |
| npm | @haxtheweb/video-player | 26.0.0 | GHSA-jh3h-rpxg-fr36 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| haxtheweb | haxcms-nodejs | < 26.0.0 |
| haxtheweb | video-player | < 26.0.0 |
| haxtheweb | iframe-loader | < 26.0.0 |
Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
References
- https://github.com/haxtheweb/issues/security/advisories/GHSA-jh3h-rpxg-fr36 x_refsource_CONFIRM