CVE-2026-70610
Electron: contextBridge object copy honors prototype setters
Description
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.
INFO
Published Date :
Aug. 5, 2026, 6:17 p.m.
Last Modified :
Aug. 5, 2026, 6:17 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-70610
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Electron to version 39.8.9 or later.
- Update Electron to version 40.9.2 or later.
- Update Electron to version 41.2.2 or later.
- Update Electron to version 42.0.0-beta.4 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-70610.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-70610 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-70610
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-70610 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-70610 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Aug. 05, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'electron', 'product': 'electron', 'versions': [{'status': 'affected', 'version': '< 39.8.9'}, {'status': 'affected', 'version': '>= 40.0.0-alpha.1, < 40.9.2'}, {'status': 'affected', 'version': '>= 41.0.0-alpha.1, < 41.2.2'}, {'status': 'affected', 'version': '>= 42.0.0-alpha.1, < 42.0.0-beta.4'}]}] Added Description 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. Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N Added CWE CWE-1321 Added Reference https://github.com/electron/electron/commit/17d5d26499cd279fab48f5f26527f8edc02a7713 Added Reference https://github.com/electron/electron/commit/23a6efb714dec80e2cf45d3054d18d701162e4dd Added Reference https://github.com/electron/electron/commit/4ac50292d552fb510eb778392620c85308770a55 Added Reference https://github.com/electron/electron/commit/5b699544cbbed51bedb7c60d75c8c42be5825737 Added Reference https://github.com/electron/electron/pull/51083 Added Reference https://github.com/electron/electron/pull/51084 Added Reference https://github.com/electron/electron/pull/51085 Added Reference https://github.com/electron/electron/pull/51086 Added Reference https://github.com/electron/electron/releases/tag/v39.8.9 Added Reference https://github.com/electron/electron/releases/tag/v40.9.2 Added Reference https://github.com/electron/electron/releases/tag/v41.2.2 Added Reference https://github.com/electron/electron/releases/tag/v42.0.0-beta.4 Added Reference https://github.com/electron/electron/security/advisories/GHSA-ff2p-hmqr-hxm4