Electron: Sandboxed preload code cache can be poisoned by a compromised renderer

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-102677
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-29 18:17:09 UTC
Updated2026-09-30 19:38:27 UTC
DescriptionElectron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. From 42.3.3 until 42.10.0, 43.5.0, and 44.0.0-beta.6, Electron's sandboxed preload code cache did not verify that a cached entry matched the preload it was served for. A compromised renderer could write attacker-controlled cache data and cause Electron to reuse it for a later load, executing the renderer's code in the more privileged preload context. The issue affects applications that load untrusted content. This issue is fixed in versions 42.10.0, 43.5.0, and 44.0.0-beta.6.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

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

Problem Types: CWE-20 | CWE-345 | CWE-20 CWE-20: Improper Input Validation | CWE-345 CWE-345: Insufficient Verification of Data Authenticity

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.8HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Electron Electron affected >= 42.3.3, < 42.10.0 Not specified
CNA Electron Electron affected >= 43.0.0-beta.1, < 43.5.0 Not specified
CNA Electron Electron affected >= 44.0.0-alpha.1, < 44.0.0-beta.6 Not specified

References

ReferenceSourceLinkTags
github.com/electron/electron/commit/c38d6fd68756f04647ea857bdb6a2abec332... [email protected] github.com
github.com/electron/electron/security/advisories/GHSA-qmv3-fv6v-rmhq [email protected] github.com
github.com/electron/electron/commit/25ba8be57c65a83d8c14ebb8aa37693df17a... [email protected] github.com
github.com/electron/electron/pull/52480 [email protected] github.com
github.com/electron/electron/commit/000453e399bd1dee5e86376cdd9ece5fc071... [email protected] github.com
github.com/electron/electron/releases/tag/v42.10.0 [email protected] github.com
github.com/electron/electron/releases/tag/v43.5.0 [email protected] github.com
github.com/electron/electron/releases/tag/v44.0.0-beta.6 [email protected] github.com
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