CVE-2026-34769

high

Published 2026-04-03 · Modified 2026-06-01

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CVSS v3

8.8

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

CVSS v4 NEW

—

not yet in upstream

VIR risk

8.8

Description

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8, an undocumented commandLineSwitches webPreference allowed arbitrary switches to be appended to the renderer process command line. Apps that construct webPreferences by spreading untrusted configuration objects may inadvertently allow an attacker to inject switches that disable renderer sandboxing or web security controls. Apps are only affected if they construct webPreferences from external or untrusted input without an allowlist. Apps that use a fixed, hardcoded webPreferences object are not affected. This issue has been patched in versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8.

Predictions

Exploit likelihood

92%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Package impact

Ecosystem	Package	Vulnerable	Fixed
npm	electron	`<38.8.6`	`38.8.6`
npm	electron	`>=39.0.0-alpha.1,<39.8.0`	`39.8.0`
npm	electron	`>=40.0.0-alpha.1,<40.7.0`	`40.7.0`
npm	electron	`>=41.0.0-alpha.1,<41.0.0-beta.8`	`41.0.0-beta.8`

Application impact

Vendor	Product	Versions	Fixed
electronjs	electron	`{"endExcluding":"38.8.6"}`	`38.8.6`
electronjs	electron	`{"startIncluding":"39.0.0","endExcluding":"39.8.0"}`	`39.8.0`
electronjs	electron	`{"startIncluding":"40.0.0","endExcluding":"40.7.0"}`	`40.7.0`
electronjs	electron	`41.0.0`

References

CWEs

CWE-88 CWE-912

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.