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Fencer Intel
medium 5.4

CVE-2026-114121 json

Electron: openExternal permission requests can be attributed to the wrong origin

published 19d ago modified 12d ago also EUVD-2026-107361 , GHSA-997q-gvvc-jwmx

cvss
5.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 12%
public exploits
0
none known

Summary

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 42.11.3, 43.7.0, 44.3.0, and 45.0.0-alpha.5, requests to open external protocol URLs could be attributed to a document other than the one that initiated them, causing the requestingUrl passed to session.setPermissionRequestHandler to identify trusted content for a launch requested by untrusted content. An application that grants openExternal based on the requesting origin and allows untrusted content to open or navigate windows could therefore allow that content to launch an OS-registered external application. This issue is fixed in versions 42.11.3, 43.7.0, 44.3.0, and 45.0.0-alpha.5.

Patch / fix

  • npm electron 42.11.3, 43.7.0, 44.3.0, 45.0.0-alpha.5
  • electronjs electron 42.11.3, 43.7.0, 44.3.0, 45.0.0-alpha.5
  • atom electron 42.11.3, 43.7.0, 44.3.0, 45.0.0-alpha.5
  • mozilla firefox 42.11.3, 43.7.0, 44.3.0, 45.0.0-alpha.5

Is CVE-2026-114121 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-114121 updated cvss 5.4

electron: Electron: Unauthorized application launch via external protocol URL misattribution

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
12d ago

Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 5.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
GitHub 3.1 5.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
npm electron
<42.11.3
>=43.0.0-alpha.1, <43.7.0
>=44.0.0-alpha.1, <44.3.0
>=45.0.0-alpha.1, <45.0.0-alpha.5
42.11.3
43.7.0
44.3.0
45.0.0-alpha.5

Affected products

  • electron electron

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.