CVE-2026-70610Electron: contextBridge object copy honors prototype setters
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.9, 40.9.2, 41.2.2, and 42.0.0-beta.4, objects copied across the contextBridge boundary from untrusted content could carry an attacker-influenced prototype, enabling prototype-pollution-style attacks against preload code despite context isolation being enabled. Apps are only affected if their preload code accepts object arguments from untrusted content and reads properties from them without own-property checks, while apps that only accept primitive arguments or validate object arguments are not affected. This issue is fixed in 39.8.9, 40.9.2, 41.2.2, and 42.0.0-beta.4.
- CVSS
- 5.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-1321
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Aug 6, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
electron electron electron:electron (from the name) | before 39.8.9; from 40.0.0-alpha.1, < 40.9.2; from 41.0.0-alpha.1, < 41.2.2; from 42.0.0-alpha.1, < 42.0.0-beta.4 | CNA record |
electronjs electron electronjs:electron | before 39.8.9; from 40.0.0 before 40.9.2; from 41.0.0 before 41.2.2; 42.0.0; 42.0.0; 42.0.0; 42.0.0; 42.0.0; and 4 more ranges | NVD |
References
- https://github.com/electron/electron/security/advisories/GHSA-ff2p-hmqr-hxm4x-refsource-confirm, vendor-advisory, mitigation
- https://github.com/electron/electron/pull/51083x-refsource-misc, issue-tracking, patch
- https://github.com/electron/electron/pull/51084x-refsource-misc, issue-tracking, patch
- https://github.com/electron/electron/pull/51085x-refsource-misc, issue-tracking, patch
- https://github.com/electron/electron/pull/51086x-refsource-misc, issue-tracking, patch
- https://github.com/electron/electron/commit/17d5d26499cd279fab48f5f26527f8edc02a7713x-refsource-misc, patch
- https://github.com/electron/electron/commit/23a6efb714dec80e2cf45d3054d18d701162e4ddx-refsource-misc, patch
- https://github.com/electron/electron/commit/4ac50292d552fb510eb778392620c85308770a55x-refsource-misc, patch
- https://github.com/electron/electron/commit/5b699544cbbed51bedb7c60d75c8c42be5825737x-refsource-misc, patch
- https://github.com/electron/electron/releases/tag/v39.8.9x-refsource-misc, release-notes
- https://github.com/electron/electron/releases/tag/v40.9.2x-refsource-misc, release-notes
- https://github.com/electron/electron/releases/tag/v41.2.2x-refsource-misc, release-notes
- https://github.com/electron/electron/releases/tag/v42.0.0-beta.4x-refsource-misc, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.