---
title: "CVE-2026-102673: Electron - Stored XSS"
description: "Electron < 41.10.4, 42.5.2, and 43.0.0 contains a stored XSS caused by sandboxed iframe popups not inheriting HTML sandbox restrictions, letting untrusted iframes access full origin cookies and scripting, exploit requires embedding untrusted content in sandboxed iframes."
url: https://panop.io/threat-heartbeat/CVE-2026-102673/
---

# CVE-2026-102673 Electron - Stored XSS

Electron < 41.10.4, 42.5.2, and 43.0.0 contains a stored XSS caused by sandboxed iframe popups not inheriting HTML sandbox restrictions, letting untrusted iframes access full origin cookies and scripting, exploit requires embedding untrusted content in sandboxed iframes.

CVSS base score 8.2 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.15% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-102673)

## Details

Type

Stored XSS

Impact

Stored XSS, Information Disclosure

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

Published

29 September 2026

Updated

15 October 2026

Weakness

[CWE-346](https://cwe.mitre.org/data/definitions/346.html)

## Vendor fix

Update to versions 41.10.4, 42.5.2, or 43.0.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-102673](https://nvd.nist.gov/vuln/detail/CVE-2026-102673)
- [https://github.com/electron/electron/security/advisories/GHSA-hq2x-r82h-9wj4](https://github.com/electron/electron/security/advisories/GHSA-hq2x-r82h-9wj4)
- [https://github.com/electron/electron/commit/7ea14d5f55ecb11a30447701ddca16b3feee0bba](https://github.com/electron/electron/commit/7ea14d5f55ecb11a30447701ddca16b3feee0bba)
- [https://github.com/electron/electron/commit/e26b2640e7795c42bfb111b76009cbb4327c9a69](https://github.com/electron/electron/commit/e26b2640e7795c42bfb111b76009cbb4327c9a69)
- [https://github.com/electron/electron/commit/ebe1165ee2b05c203c26dd2244ef1c5b9b1c04da](https://github.com/electron/electron/commit/ebe1165ee2b05c203c26dd2244ef1c5b9b1c04da)
- [https://github.com/electron/electron/pull/52133](https://github.com/electron/electron/pull/52133)
- [https://github.com/electron/electron/releases/tag/v41.10.4](https://github.com/electron/electron/releases/tag/v41.10.4)
- [https://github.com/electron/electron/releases/tag/v42.5.2](https://github.com/electron/electron/releases/tag/v42.5.2)
- [https://github.com/electron/electron/releases/tag/v43.0.0](https://github.com/electron/electron/releases/tag/v43.0.0)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)