Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-102673

CVE-2026-102673MEDIUM

Electron drops inherited HTML sandbox restrictions for popups opened through OpenURLFromTab

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   R  C  L  L  N    6.1   .0013    2.5     —

AFFECTED
  Product   Versions     Fixed
  electron  < 41.10.4 –  —

TIMELINE
  Sep 29  Reserved by GitHub_M
  Sep 29  Published (CNA: GitHub_M)
  Oct 15  RESCORED — CVE-2026-102673 (electron). CVSS 8.2 → 6.1 (NVD).

CWE-346, CWE-693 · CNA: GitHub_M · CVSS v3.1 · 8 references · NVD status: Analyzed

Description

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 41.10.4, 42.5.2, and 43.0.0, popups opened from a sandboxed iframe through Electron's OpenURLFromTab navigation path, including links using target="_blank" or a middle-click, did not receive the inherited HTML sandbox restrictions. An untrusted iframe using the allow-scripts allow-popups configuration could therefore open a popup with the embedding application's full origin, exposing that origin's cookies, storage, and same-origin scripting capabilities. Applications that do not embed untrusted content in sandboxed iframes are not affected. This issue is fixed in versions 41.10.4, 42.5.2, and 43.0.0.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
September 29, 2026	Reserved	Reserved by GitHub_M
September 29, 2026	Published	Published (CNA: GitHub_M)
October 15, 2026	RESCORED	RESCORED — CVE-2026-102673 (electron). CVSS 8.2 → 6.1 (NVD).

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
electron	electron	—	< 41.10.4	—

Weaknesses

CWE-346 · CWE-693

References (8)

https://github.com/electron/electron/commit/7ea14d5f55ecb11a30447701ddca16b3feee0bba [Patch]
https://github.com/electron/electron/commit/e26b2640e7795c42bfb111b76009cbb4327c9a69 [Patch]
https://github.com/electron/electron/commit/ebe1165ee2b05c203c26dd2244ef1c5b9b1c04da [Patch]
https://github.com/electron/electron/pull/52133 [Issue Tracking, Patch]
https://github.com/electron/electron/releases/tag/v41.10.4 [Issue Tracking, Patch]
https://github.com/electron/electron/releases/tag/v42.5.2 [Release Notes]
https://github.com/electron/electron/releases/tag/v43.0.0 [Release Notes]
https://github.com/electron/electron/security/advisories/GHSA-hq2x-r82h-9wj4 [Vendor Advisory]

Authoritative record: CVE-2026-102673 at cve.org

Vendors: electron

Weaknesses: CWE-346 · CWE-693

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-102673 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.