CVE-2020-4077

mediumpriority · track · 40EPSS 0.010 · 63 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.00% (63rd) EPSS

CVSS 6.5 · medium

Is it mine?

8 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

In Electron before versions 7.2.4, 8.2.4, and 9.0.0-beta21, there is a context isolation bypass. Code running in the main world context in the renderer can reach into the isolated Electron context and perform privileged actions. Apps using both `contextIsolation` and `contextBridge` are affected. This is fixed in versions 9.0.0-beta.21, 8.2.4 and 7.2.4.

cvss

Technical severity, 0–10. One row per scoring source.

9.9

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 6.5–9.9

v2.06.5mediumAV:N/AC:L/Au:S/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8 · impact 6.4

v3.19.9criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.1 · impact 6

v3.17.7highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:Nsecondary · ENISA EU

v3.17.7highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:Nsecondary · security-advisories@github.comexploitability 3.1 · impact 4

v3.17.7highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:Nsecondary · OSV

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-501USCWE-501US

affected products (8)

Products and version ranges known to be affected.

Electron Electron≤ < 7.2.4enisa_euvdEU
Electron Electron≤ 9.0.0-beta.0, ≤ 9.0.0-beta.20enisa_euvdEU
Electron Electron8.0.0, → 8.2.4enisa_euvdEU
electronjs electron7.0.0 → 7.2.4nvdUScpe:2.3:a:electronjs:electron:*:*:*:*:*:*:*:*
electronjs electron8.0.0 → 8.2.4nvdUScpe:2.3:a:electronjs:electron:*:*:*:*:*:*:*:*
electronjs electron= 9.0.0nvdUScpe:2.3:a:electronjs:electron:*:*:*:*:*:*:*:*
npm electron< 7.2.4osvUSpkg:npm/electron
npm electron8.0.0 → 8.2.4osvUSpkg:npm/electron

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-h9jc-284h-533gContext isolation bypass via contextBridge in Electron2020-07-07ghsa · osvUS
### Impact Apps using both `contextIsolation` and `contextBridge` are affected. This is a context isolation bypass, meaning that code running in the main world context in the renderer can reach into the isolated Electron context and perform privileged actions. ### Workarounds There are no app-side workarounds, you must update your Electron version to be protected. ### Fixed Versions * `9.0.0-beta.21` * `8.2.4` * `7.2.4` ### For more information If you have any questions or comments about this advisory: * Email us at [security@electronjs.org](mailto:security@electronjs.org)

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2020-07-07modified 2026-06-17

references (7)

External citations — patches, advisories, analysis.

scry

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