CVE-2026-46396

CRITICALPre-NVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 86% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Elevated
9.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.3Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 ` 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.

CVSS v3
9.3
EG Score
9.3(medium)
EPSS
13.8%
KEV
Not listed

Published

May 19, 2026

Last Modified

June 9, 2026

Advisory Details (1)

Auto-updated Jun 5, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Stored XSS via <iframe> in HAX CMS allows access to sensitive client-side data and account takeover · Advisory · haxtheweb/issues · GitHub

https://github.com/haxtheweb/issues/security/advisories/GHSA-jh3h-rpxg-fr36

Vendor Advisories for CVE-2026-46396(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(3 across 1 ecosystem)
npm(3)
PackageVulnerable rangeFixed inDependents
@haxtheweb/haxcms-nodejs—26.0.0—
@haxtheweb/iframe-loader—26.0.0—
@haxtheweb/video-player—26.0.0—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 91× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 111 total refreshes for this CVE.

  1. 2026-07-08 15:16 UTCEPSS rescore
  2. 2026-07-07 13:46 UTCEPSS rescore
  3. 2026-07-06 16:27 UTCEPSS rescore
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  13. 2026-06-28 14:01 UTCEG score recompute
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  1. 2026-06-25 17:07 UTCEG score recompute
  2. 2026-06-25 13:49 UTCEPSS rescore
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  24. 2026-06-16 07:48 UTCEG score recompute
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  27. 2026-06-15 17:49 UTCEPSS rescore
  28. 2026-06-15 16:26 UTCEG score recompute
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  36. 2026-06-13 23:00 UTCEPSS rescore
  37. 2026-06-13 22:43 UTCEG score recompute
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  42. 2026-06-12 23:12 UTCEPSS rescore
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  44. 2026-06-12 20:22 UTCEG score recompute
  45. 2026-06-12 15:58 UTCEG score recompute
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  49. 2026-06-11 21:56 UTCEG score recompute
  50. 2026-06-11 17:34 UTCEG score recompute
  51. 2026-06-11 14:00 UTCEPSS rescore
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  56. 2026-06-10 22:18 UTCEPSS rescore
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  59. 2026-06-10 13:22 UTCEPSS rescore
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  61. 2026-06-10 10:56 UTCEG score recompute
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  70. 2026-06-08 19:34 UTCEG score recompute
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  72. 2026-06-08 14:17 UTCEPSS rescore
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  74. 2026-06-08 10:03 UTCEG score recompute
  75. 2026-06-08 05:40 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-46396?
CVE-2026-46396 is a critical vulnerability published on May 19, 2026. 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…
When was CVE-2026-46396 disclosed?
CVE-2026-46396 was first published in the National Vulnerability Database on May 19, 2026, with the most recent update on June 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46396 actively exploited?
CVE-2026-46396 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 13.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-46396?
CVE-2026-46396 has a CVSS v3 base score of 9.3 (NVD).
How do I remediate CVE-2026-46396?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46396, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-46396

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