5.4

CVE-2026-70610: electron Prototype Pollution

CVSS: 5.4v3.1MediumAnalyzed
AliasesGHSA-ff2p-hmqr-hxm4
Published 05-08-2026Last modified 06-08-2026
Open JSON

Vulnerability summary

CVE-2026-70610 is a medium (CVSS 5.4) Prototype Pollution vulnerability in electron. EPSS estimates a 0.56% chance of exploitation in the next 30 days, higher than 45.7% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.4/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.56%
0%100%
Low · +0.09 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 05-08-2026
    PublishedVulnerability first disclosed.
  2. 06-08-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.56%

Chance of exploitation in the next 30 days

Percentile

46%

Versus all other CVEs

30-day change

+0.09 pp

From 0.48% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.56%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Electron1 product
  • electron< 39.8.9 | ≥ 40.0.0-alpha.1, < 40.9.2 | ≥ 41.0.0-alpha.1, < 41.2.2 | ≥ 42.0.0-alpha.1, < 42.0.0-beta.4
Electronjs1 product
  • electronEOL< 39.8.9 | ≥ 40.0.0, < 40.9.2 | ≥ 41.0.0, < 41.2.2 | 42.0.0:alpha1 | 42.0.0:alpha2 | 42.0.0:alpha3 | 42.0.0:alpha4 | 42.0.0:alpha5 | 42.0.0:alpha6 | 42.0.0:beta1 | 42.0.0:beta2 | 42.0.0:beta3
Npm1 product
  • electron< 39.8.9 | ≥ 40.0.0-alpha.1, < 40.9.2 | ≥ 41.0.0-alpha.1, < 41.2.2 | ≥ 42.0.0-alpha.1, < 42.0.0-beta.4

3 vendors · 3 products

References

14 links
Show all 14 references