5.9

CVE-2026-70606: electron Exposure of Resource to Wrong Sphere

CVSS: 5.9v3.1MediumAnalyzed
AliasesGHSA-r4w5-6pfg-jxp5
Published 05-08-2026Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2026-70606 is a medium (CVSS 5.9) Exposure of Resource to Wrong Sphere vulnerability in electron. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 16% of scored vulnerabilities.

Overall risk
24/100
0100
Low · default modelHow is this calculated?
CVSS score
5.9/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.26%
0%100%
Low · +0.10 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. 05-08-2026
    Last modifiedVulnerability information updated.

Description

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 40.10.6, 41.9.1, 42.5.1, and 43.0.0, when a custom protocol handler returned a ProtocolResponse with a url and no session, Electron made the upstream request through defaultSession instead of the session that handled the protocol. A cached response could then be reused across otherwise isolated session partitions. Apps that use ProtocolResponse.url, omit ProtocolResponse.session, and rely on separate sessions to isolate content are affected. This issue is fixed in versions 40.10.6, 41.9.1, 42.5.1, and 43.0.0.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.26%

Chance of exploitation in the next 30 days

Percentile

16%

Versus all other CVEs

30-day change

+0.10 pp

From 0.16% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.26%

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≥ 40.0.0-alpha.1, < 40.10.6 | ≥ 41.0.0-alpha.1, < 41.9.1 | ≥ 42.0.0-alpha.1, < 42.5.1 | ≥ 43.0.0-alpha.1, < 43.0.0
Electronjs1 product
  • electron< 40.10.6 | ≥ 41.0.0, ≤ 41.9.1 | ≥ 42.0.0, ≤ 42.5.1 | 43.0.0:alpha1 | 43.0.0:alpha2 | 43.0.0:alpha3 | 43.0.0:alpha4 | 43.0.0:alpha5
Npm1 product
  • electron≥ 43.0.0-alpha.1, < 43.0.0 | ≥ 42.0.0-alpha.1, < 42.5.1 | ≥ 41.0.0-alpha.1, < 41.9.1 | ≥ 40.0.0-alpha.1, < 40.10.6

3 vendors · 3 products

References

2 links