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Fencer Intel
critical 9.3

CVE-2026-46396 json

HAX CMS has a stored XSS via <iframe> that allows access to sensitive client-side data and account takeover

published 5mo ago modified last mo. also EUVD-2026-34891 , GHSA-jh3h-rpxg-fr36

cvss
9.3
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 13%
public exploits
0
none known

Summary

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.

Patch / fix

  • npm @haxtheweb/haxcms-nodejs 26.0.0
  • npm @haxtheweb/video-player 26.0.0
  • npm @haxtheweb/iframe-loader 26.0.0
  • haxtheweb haxcms-nodejs 26.0.0
  • haxtheweb video-player 26.0.0
  • haxtheweb iframe-loader 26.0.0
  • haxtheweb haxcms-php 26.0.0

Is CVE-2026-46396 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
5mo ago

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/haxtheweb/issues/security/advisories/GHSA-jh3h-rpxg-fr36 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 9.3 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
CNA 4.0 9.3 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

Affected packages

ecosystem package affected fixed in
npm @haxtheweb/haxcms-nodejs
<26.0.0
26.0.0
npm @haxtheweb/video-player
<26.0.0
26.0.0
npm @haxtheweb/iframe-loader
<26.0.0
26.0.0

Affected products

  • haxtheweb haxcms-nodejs
  • haxtheweb video-player
  • haxtheweb iframe-loader

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.