CVE-2026-102677
Electron: Sandboxed preload code cache can be poisoned by a compromised renderer
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th
Electron 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.
| CWE | CWE-20 CWE-345 |
| Vendor | electron |
| Product | electron |
| Published | Sep 29, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
electron / electron
>= 42.3.3, < 42.10.0 >= 43.0.0-beta.1, < 43.5.0 >= 44.0.0-alpha.1, < 44.0.0-beta.6
References
github.com: https://github.com/electron/electron/security/advisories/GHSA-qmv3-fv6v-rmhq github.com: https://github.com/electron/electron/pull/52480 github.com: https://github.com/electron/electron/commit/000453e399bd1dee5e86376cdd9ece5fc071e601 github.com: https://github.com/electron/electron/commit/25ba8be57c65a83d8c14ebb8aa37693df17a04f3 github.com: https://github.com/electron/electron/commit/c38d6fd68756f04647ea857bdb6a2abec332e217 github.com: https://github.com/electron/electron/releases/tag/v42.10.0 github.com: https://github.com/electron/electron/releases/tag/v43.5.0 github.com: https://github.com/electron/electron/releases/tag/v44.0.0-beta.6