PatchSiren cyber security CVE debrief

CVE-2026-46496 haxtheweb CVE debrief

A stored cross-site scripting (XSS) vulnerability exists in HAX CMS versions prior to 26.0.0. The vulnerability is caused by improper sanitization of the `<video-player>` component, which allows `javascript:` URIs in the `source` attribute. These URIs are executed when the page is viewed, enabling attackers to execute arbitrary JavaScript in the context of the victim's browser. This allows access to sensitive data such as JWT tokens. The issue is fixed in version 26.0.0.

Vendor: haxtheweb
Product: haxcms-nodejs
CVSS: CRITICAL 9.3
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-05
Original CVE updated: 2026-06-05
Advisory published: 2026-06-05
Advisory updated: 2026-06-05

Who should care

Users of HAX CMS versions prior to 26.0.0 should update to version 26.0.0 or later to mitigate this vulnerability.

Technical summary

The vulnerability has a CVSS score of 9.3 and is classified as CRITICAL. The CVSS vector is 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X.

Defensive priority

This vulnerability is considered high priority for users of HAX CMS versions prior to 26.0.0.

Recommended defensive actions

Update to version 26.0.0 or later

Evidence notes

The vulnerability is caused by improper sanitization of the `<video-player>` component.

Official resources

CVE-2026-46496 was published on 2026-06-05T19:16:34.113Z and modified on 2026-06-05T20:17:34.710Z.