GHSA-997q-gvvc-jwmx CVE-2026-114121

Electron: openExternal permission requests can be attributed to the wrong origin

Medium npm

Severity: 5.4 / 10; Medium · CVSS 3.1
Exploit chance (EPSS): 0.22%; Chance of exploitation in the next 30 days. Higher than 12.41% of scored vulnerabilities.
Known exploited: No; Not in CISA's catalog
Weakness: CWE-346 Origin Validation Error
Fix: 42.11.3; Upgrade electron to this version or later

Description

Impact

Requests to open external protocol URLs could be attributed to a document other than the one that asked for them, so the requestingUrl passed to session.setPermissionRequestHandler was a trusted origin for a launch untrusted content had requested. An origin-based handler could therefore let untrusted content launch an OS-registered external application.

Apps are only affected if they grant openExternal based on the requesting origin and let untrusted content open or navigate windows. Apps whose permission handler denies openExternal for untrusted content are not affected.

Workarounds

Deny the openExternal permission for untrusted content, or deny the windows it opens with setWindowOpenHandler.

Fixed Versions

45.0.0-alpha.5
44.3.0
43.7.0
42.11.3

For more information

If you have any questions or comments about this advisory, email us at security@electronjs.org

Affected versions

npm

Package	Vulnerable	Fixed in
electron	`< 42.11.3`	`42.11.3`
electron	`>= 43.0.0-alpha.1, < 43.7.0`	`43.7.0`
electron	`>= 44.0.0-alpha.1, < 44.3.0`	`44.3.0`
electron	`>= 45.0.0-alpha.1, < 45.0.0-alpha.5`	`45.0.0-alpha.5`

How to fix

Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.

electron npm → `42.11.3`

npm

npm install electron@42.11.3

yarn

yarn add electron@42.11.3

pnpm

pnpm add electron@42.11.3

Severity breakdown

CVSS 3.1 5.4

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

Attack vector: Network
Attack complexity: High
Privileges required: None
User interaction: None
Scope: Changed
Confidentiality: Low
Integrity: Low
Availability: None

Weakness

CWE-346: Origin Validation Error

The product does not properly verify that the source of data or communication is valid.

References

Advisories

nvd.nist.gov/vuln/detail/CVE-2026-114121

Packages

github.com/electron/electron

Timeline

Oct 21, 2026 Published
Oct 28, 2026 Last updated by the source
Nov 1, 2026 Latest EPSS score

Advisory	Severity	Why it's related
GHSA-qqvq-6xgj-jw8g Electron affected by libvpx's heap buffer overflow in vp8 encoding	High Known exploited	Also affects electron
GHSA-j7hp-h8jx-5ppr libwebp: OOB write in BuildHuffmanTable	High Known exploited	Also affects electron
GHSA-995f-9x5r-2rcj Heap buffer overflow in GPU	Critical Known exploited	Also affects electron
GHSA-jr5w-w6x2-84p9 Electron: Mitigation for compromised eMudhra intermediate certificates	High	Also affects electron
GHSA-h3v5-h239-pg29 Electron: Off-screen rendering on macOS trusts GPU-supplied frame geometry	Low	Also affects electron
GHSA-3qxv-5xgr-q7w9 Electron: Frame subscription trusts GPU-supplied frame geometry	Low	Also affects electron
GHSA-fw47-9c62-h3vw Electron: HID and USB permission checks can be attributed to the wrong origin	Medium	Also affects electron
GHSA-x562-297c-g43g Electron: Pointer lock permission requests can be attributed to the wrong frame	Medium	Also affects electron

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