Skip to main content
VulnerabilityPublished

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

Affects electronSource GCVE Database

0
Compare

Not known to be exploited · CVSS 8.2 High : upgrade to 44.0.0-beta.5 soon.

Data as of 13 Nov 2026, 23:53 UTC

CVSS 3.1 base score
8.2High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 14% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 44.0.0-beta.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 14 Nov 2026.

What to do

Upgrade electron to 44.0.0-beta.5.

Affected software

ProductAffectedFixed in
npmelectronAffected
  • >=44.0.0-alpha.1 <44.0.0-beta.5
Fixed in
  • 44.0.0-beta.5

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available in Electron versions 41.10.6, 42.9.2, 43.4.1, and 44.0.0-beta.5. Users should upgrade to these or later versions to remediate the vulnerability. As a workaround, applications can return { action: 'deny' } from setWindowOpenHandler for windows opened by untrusted content to prevent popup windows from bypassing sandbox restrictions.

Description

Electron versions prior to 41.10.6, 42.9.2, 43.4.1, and 44.0.0-beta.5 contain a vulnerability where windows opened from a sandboxed top-level document do not inherit the document's HTML sandbox restrictions. This allows sandboxed content to open new windows with the app's full origin, potentially escalating privileges. The issue affects apps rendering untrusted content in sandboxed top-level documents that allow popups. Apps that deny popups from untrusted content using setWindowOpenHandler are not affected. Fixes are available in the specified versions.

References

Community reviews

Loading reviews…