CVE-2026-114121

MEDIUMPre-NVD 5.45.4
EchelonGraph scoreLOW confidence

This medium-severity CVE scores 5.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: a secondary CVSS source
5.4EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 5.4Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

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.

CVSS v3
5.4
EG Score
5.4MEDIUMlow confidence
EG Risk
24
EG Risk 24/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity54% × 45%
Impact severity (EG Severity): CVSS 5.4 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0% × 40%
No KEV listing, EG-KEV tier or EPSS when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: The CVE record names the fixed release. Apply it within your standard update timelines.
EPSS PROB
—
EPSS %ILE
—
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (5.4): severity, escalated by confirmed exploitation. This CVE's 5.4 is its impact severity (EG Severity), not escalated.

EG Severity
5.4 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
Unknown (no EPSS on record)Unknown, not low: FIRST has published no EPSS probability for this CVE.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

The CVE record names the fixed release. Apply it within your standard update timelines.

Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

October 21, 2026

Last Modified

October 21, 2026

Advisory Details (10)

Auto-updated Oct 21, 2026
Fix named in the CVE record. Sources: github_commit, github_pr.
GitHub pull request

fix: attribute openExternal permission requests to the navigation's initiator

Fix merged in electron/electron PR #53699 on 2026-09-07 — awaiting tagged release

https://github.com/electron/electron/pull/53699
GitHub pull request

fix: attribute openExternal permission requests to the navigation's initiator

Fix merged in electron/electron PR #53698 on 2026-09-07 — awaiting tagged release

https://github.com/electron/electron/pull/53698
GitHub pull request

fix: attribute openExternal permission requests to the navigation's initiator

Fix merged in electron/electron PR #53697 on 2026-09-07 — awaiting tagged release

https://github.com/electron/electron/pull/53697
GitHub pull request

fix: attribute openExternal permission requests to the navigation's initiator

Fix merged in electron/electron PR #53696 on 2026-09-07 — awaiting tagged release

https://github.com/electron/electron/pull/53696
GitHub pull request

fix: attribute openExternal permission requests to the navigation's initiator

Fix merged in electron/electron PR #53682 on 2026-09-07 — awaiting tagged release

https://github.com/electron/electron/pull/53682
GitHub commit

commit e3a400911084 (electron/electron)

Fix landed in electron/electron commit e3a400911084 — awaiting tagged release

https://github.com/electron/electron/commit/e3a400911084537bce7380ffea8af939572ce8dd
GitHub commit

commit e0a20d5277b5 (electron/electron)

Fix landed in electron/electron commit e0a20d5277b5 — awaiting tagged release

https://github.com/electron/electron/commit/e0a20d5277b567aea8603f8e9852a4341407a586
GitHub commit

commit 92a783952891 (electron/electron)

Fix landed in electron/electron commit 92a783952891 — awaiting tagged release

https://github.com/electron/electron/commit/92a783952891805f2f82f344c40a6917b98a7d98
GitHub commit

commit 8aa5414f7379 (electron/electron)

Fix landed in electron/electron commit 8aa5414f7379 — awaiting tagged release

https://github.com/electron/electron/commit/8aa5414f73792ed3b2e3f9ab6391b1832e6dc2c3
GitHub commit

commit 25057643bf6d (electron/electron)

Fix landed in electron/electron commit 25057643bf6d — awaiting tagged release

https://github.com/electron/electron/commit/25057643bf6d9a20bad69e45707551ccf546f5ce

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 3× in last 7d / 3× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-10-21 17:27 UTCEG score recompute
  2. 2026-10-21 16:28 UTCEG score recomputeFirst assessed: 5.4 MEDIUM
  3. 2026-10-21 16:25 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-114121?
CVE-2026-114121 is a medium-severity vulnerability; its CVE record was published on October 21, 2026. 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…
When was the CVE record for CVE-2026-114121 published?
The CVE record for CVE-2026-114121 was published on October 21, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 21, 2026; the record at its source may have been updated since.
What is the CVSS score of CVE-2026-114121?
CVE-2026-114121 has a CVSS base score of 5.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-114121?
The CVE record for CVE-2026-114121 names the fix: "This issue is fixed in versions 42.11.3, 43.7.0, 44.3.0, and 45.0.0-alpha.5."

Dependency Blast Radius

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