CVE-2026-102677 · GHSA-qmv3-fv6v-rmhq
Electron: Sandboxed preload code cache can be poisoned by a compromised renderer
- Risk score
- 58/100
- CVSS
- 8.8 v3.1
- Exploit chance (30 days)
- 0.1%
- Published
- 29 Sep 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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-con…
- Affected
- electron (npm) >= 42.3.3, < 42.10.0; electron (npm) >= 43.0.0-beta.1, < 43.5.0; electron (npm) >= 44.0.0-alpha.1, < 44.0.0-beta.6
- Fix
- Upgrade electron to 42.10.0 or 43.5.0 or 44.0.0-beta.6 (whichever matches your release line) or later.
- Exploitation
- No known exploitation
Story map
At a glance
electron: Red, act today. Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 41.10.6, 42.9.2, 43.4.1, and 44.0.0-beta.5, an Electron <webview> guest could enable nodeIntegrationInWorker for its Web Workers even when the unsandboxed embedder had Node.js integration disabled, allowing…
The flaws
- CVE-2026-102677: Electron: Sandboxed preload code cache can be poisoned by a compromised renderer (CVSS 8.8 · EPSS 0%)
- CVE-2026-102676: Electron: <webview> can enable Node.js integration in Web Workers despite embedder restrictions (CVSS 9.8 · EPSS 0%)
- CVE-2026-102674: Electron: Windows opened from a sandboxed top-level document do not inherit its sandbox restrictions (CVSS 6.1 · EPSS 0%)
- CVE-2026-102673: Electron drops inherited HTML sandbox restrictions for popups opened through OpenURLFromTab (CVSS 6.1 · EPSS 0%)
The fix
Upgrade electron: 42.10.0 · 43.5.0 · 44.0.0 · 41.10.6 · 42.9.2 · 43.4.1 or later on your release line
Who is exposed: electron (npm) < 41.10.6; electron (npm) >= 42.0.0-alpha.1, < 42.9.2; electron (npm) >= 43.0.0-alpha.1, < 43.4.1; electron (npm) >= 44.0.0-alpha.1, < 44.0.0-beta.5
Where it stands
- No known exploitation
Connects to
- Same weakness: CWE-345 (CWE-345). 45 other warnings in 30 days
Why it is Yellow
- CVSS 8.8 high
- On your watchlist: npm
Affected packages
| Package | Ecosystem | Vulnerable | Fixed in |
|---|---|---|---|
| electron | npm | >= 42.3.3, < 42.10.0 | 42.10.0 |
| electron | npm | >= 43.0.0-beta.1, < 43.5.0 | 43.5.0 |
| electron | npm | >= 44.0.0-alpha.1, < 44.0.0-beta.6 | 44.0.0-beta.6 |
References
- https://github.com/advisories/GHSA-qmv3-fv6v-rmhq
- https://github.com/electron/electron/security/advisories/GHSA-qmv3-fv6v-rmhq
- https://github.com/electron/electron/pull/52480
- https://github.com/electron/electron/commit/000453e399bd1dee5e86376cdd9ece5fc071e601
- https://github.com/electron/electron/commit/06a12a87a23f40abbf580fc7a552bc1189812c45
- https://github.com/electron/electron/commit/25ba8be57c65a83d8c14ebb8aa37693df17a04f3
- https://github.com/electron/electron/commit/c38d6fd68756f04647ea857bdb6a2abec332e217
- https://github.com/electron/electron/releases/tag/v42.10.0
- https://github.com/electron/electron/releases/tag/v43.5.0
- https://github.com/electron/electron/releases/tag/v44.0.0-beta.6
Original description
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.
Last activity 29 Sep 2026. Patch Forecast updates every hour.