TI-2026-27011 Aliases CVE-2026-34767 GHSA-4p4r-m79c-wq3v

Electron: HTTP Response Header Injection in custom protocol handlers and webRequest

LOW 28CWE-113Published 2026-04-03 · Updated 2026-04-06

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · High · None
Fix status: Partial Red Hat: 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat.

Summary

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.3, 40.8.3, and 41.0.3, apps that register custom protocol handlers via protocol.handle() / protocol.registerSchemesAsPrivileged() or modify response headers via webRequest.onHeadersReceived may be vulnerable to HTTP response header injection if attacker-controlled input is reflected into a response header name or value. An attacker who can influence a header value may be able to inject additional response headers, affecting cookies, content security policy, or cross-origin access controls. Apps that do not reflect external input into response headers are not affected. This issue has been patched in versions 38.8.6, 39.8.3, 40.8.3, and 41.0.3.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00215 11th percentileScored 2026-11-07

Fix Partial electron (electron): 38.8.6, 39.8.3, 40.8.3 +1electron (npm): 38.8.6, 39.8.3, 40.8.3 +1Red Hat: 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
electron	electron	before 38.8.6; 39.0.0-alpha.1 to before 39.8.3; 40.0.0-alpha.1 to before 40.8.3; 41.0.0-alpha.1 to before 41.0.3	38.8.6, 39.8.3, 40.8.3, 41.0.3	Patch available	CNA
—	electron (npm)	before 38.8.6	38.8.6	Patch available	GHSA-4p4r-m79c-wq3v
—	electron (npm)	39.0.0-alpha.1 to before 39.8.3	39.8.3	Patch available	GHSA-4p4r-m79c-wq3v
—	electron (npm)	40.0.0-alpha.1 to before 40.8.3	40.8.3	Patch available	GHSA-4p4r-m79c-wq3v
—	electron (npm)	41.0.0-alpha.1 to before 41.0.3	41.0.3	Patch available	GHSA-4p4r-m79c-wq3v

electron Vendorelectron Affected before 38.8.6; 39.0.0-alpha.1 to before 39.8.3; 40.0.0-alpha.1 to before 40.8.3; 41.0.0-alpha.1 to before 41.0.3 Fixed in 38.8.6, 39.8.3, 40.8.3, 41.0.3 Patch available CNA
electron (npm) Vendor— Affected before 38.8.6 Fixed in 38.8.6 Patch available GHSA-4p4r-m79c-wq3v
electron (npm) Vendor— Affected 39.0.0-alpha.1 to before 39.8.3 Fixed in 39.8.3 Patch available GHSA-4p4r-m79c-wq3v
electron (npm) Vendor— Affected 40.0.0-alpha.1 to before 40.8.3 Fixed in 40.8.3 Patch available GHSA-4p4r-m79c-wq3v
electron (npm) Vendor— Affected 41.0.0-alpha.1 to before 41.0.3 Fixed in 41.0.3 Patch available GHSA-4p4r-m79c-wq3v

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:electronjs:electron::::::node.js::*	before 38.8.6; 39.0.0 to before 39.8.3; 40.0.0 to before 40.8.3; 41.0.0 to before 41.0.3	Vulnerable	Electronjs

cpe:2.3:a:electronjs:electron:*:*:*:*:*:node.js:*:* Versions before 38.8.6; 39.0.0 to before 39.8.3; 40.0.0 to before 40.8.3; 41.0.0 to before 41.0.3 Vulnerable ·Electronjs

Remediation

Fix · CNA electron (electron) Fixed in 38.8.6, 39.8.3, 40.8.3, 41.0.3
Fix · GHSA-4p4r-m79c-wq3v electron (npm) Fixed in 38.8.6 Advisory →
Fix · GHSA-4p4r-m79c-wq3v electron (npm) Fixed in 39.8.3 Advisory →
Fix · GHSA-4p4r-m79c-wq3v electron (npm) Fixed in 40.8.3 Advisory →
Fix · GHSA-4p4r-m79c-wq3v electron (npm) Fixed in 41.0.3 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Build of Podman Desktop	Affected	No fix yet: Fix deferred
Red Hat Build of Podman Desktop - Tech Preview	Affected	No fix yet: Fix deferred

Timeline

2026-10-02 Threatist record created from CVE-2026-34767
2026-10-03 Alias added: GHSA-4p4r-m79c-wq3v

References

Advisory 2

Other 1

https://github.com/electron/electron

TI-2026-39496 Information disclosure in electron-builder CVSS 4.0HIGH 8.2
TI-2024-26621 Code Signing Bypass on Windows in electron-updater < 6.3.0-alpha.6 CVSS 3.1HIGH 7.5
TI-2023-09452 Content-Secrity-Policy disabling eval not applied consistently in renderers with sandbox disabled in Electron CVSS 3.1CRITICAL 9.8
TI-2026-39157 Electron: Buffer performs incorrect byte length calculations resulting in heap buffer under/overflow CVSS 4.0CRITICAL 9.3
TI-2017-09308 GitHub Electron before 1.6.8 allows remote command execution because of a nodeIntegration… CVSS 3.0HIGH 8.1
TI-2022-11788 Exposure of Resource to Wrong Sphere in Electron CVSS 3.1CRITICAL 9.8

See all 74 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences