CVE-2026-102673

HIGHNVD 6.18.2
EchelonGraph scoreMEDIUM confidence

“▲” beside the score: it is higher than NVD's CVSS score.

Score 8.2 from GitHub Security Advisory (severity: HIGH) published 2026-09-29. NVD baseline CVSS 6.1; sources differ by 2.1.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this week

Also known asEUVD-2026-89078 (ENISA EUVD) · GHSA-hq2x-r82h-9wj4 (GitHub Security Advisories)Source: ENISA EUVD

8.2EG
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: 0.1%CVSS: 6.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 41.10.4, 42.5.2, and 43.0.0, popups opened from a sandboxed iframe through Electron's OpenURLFromTab navigation path, including links using target="_blank" or a middle-click, did not receive the inherited HTML sandbox restrictions. An untrusted iframe using the allow-scripts allow-popups configuration could therefore open a popup with the embedding application's full origin, exposing that origin's cookies, storage, and same-origin scripting capabilities. Applications that do not embed untrusted content in sandboxed iframes are not affected. This issue is fixed in versions 41.10.4, 42.5.2, and 43.0.0.

CVSS v3
6.1
EG Score
8.2HIGHmedium confidence
EG Risk
37
EG Risk 37/100

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)
Severity82% × 45%
Impact severity (EG Severity): CVSS 8.2 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
2nd
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 (8.2): severity, escalated by confirmed exploitation. This CVE's 8.2 is its impact severity (EG Severity), not escalated.

EG Severity
8.2 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). FIRST's exploitation probability, not an EchelonGraph model.
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 every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). 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

September 29, 2026

Last Modified

October 15, 2026

Advisory Details (8)

Auto-updated Sep 29, 2026
Patch available. Sources: github_commit, github_release, github, github_pr.
GitHub release Patch Available

electron v43.0.0

Patch available: electron/electron v43.0.0

https://github.com/electron/electron/releases/tag/v43.0.0
GitHub release Patch Available

electron v42.5.2

Patch available: electron/electron v42.5.2

https://github.com/electron/electron/releases/tag/v42.5.2
GitHub release Patch Available

electron v41.10.4

Patch available: electron/electron v41.10.4

https://github.com/electron/electron/releases/tag/v41.10.4
GitHub commit

commit ebe1165ee2b0 (electron/electron)

Fix landed in electron/electron commit ebe1165ee2b0 — awaiting tagged release

https://github.com/electron/electron/commit/ebe1165ee2b05c203c26dd2244ef1c5b9b1c04da
GitHub commit

commit e26b2640e779 (electron/electron)

Fix landed in electron/electron commit e26b2640e779 — awaiting tagged release

https://github.com/electron/electron/commit/e26b2640e7795c42bfb111b76009cbb4327c9a69
GitHub commit

commit 7ea14d5f55ec (electron/electron)

Fix landed in electron/electron commit 7ea14d5f55ec — awaiting tagged release

https://github.com/electron/electron/commit/7ea14d5f55ecb11a30447701ddca16b3feee0bba
GitHub pull request

fix: inherit iframe sandbox flags in windows opened on the OpenURL navigation path

Fix merged in electron/electron PR #52133 on 2026-06-29 — awaiting tagged release

https://github.com/electron/electron/pull/52133
GitHub advisoryMentions a patch (unverified)

Electron drops inherited HTML sandbox restrictions for popups opened through OpenURLFromTab · Advisory · electron/electron · GitHub

https://github.com/electron/electron/security/advisories/GHSA-hq2x-r82h-9wj4

Vendor Advisories for CVE-2026-102673(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(3)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
npmelectron @ 41.10.4 (fixes < 41.10.4)—ghsa
npmelectron @ 42.5.2 (fixes >= 42.0.0-alpha.1, < 42.5.2)—ghsa
npmelectron @ 43.0.0 (fixes >= 43.0.0-alpha.1, < 43.0.0)—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
electron—
  • every version up to 41.10.4: fixed in 41.10.4
  • 42.0.0-alpha.1 up to 42.5.2: fixed in 42.5.2
  • 43.0.0-alpha.1 up to 43.0.0: fixed in 43.0.0
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 47× 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. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  2. 2026-11-01 08:00 UTCGHSA enrichmentGHSA-hq2x-r82h-9wj4 · GitHub severity HIGH · GitHub CVSS 8.2
  3. 2026-11-01 08:00 UTCEG score recompute▲ 2.10
  4. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  5. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  6. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  7. 2026-10-27 17:55 UTCOSV refresh
  8. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  9. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  10. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  11. 2026-10-25 14:56 UTCEG score recompute
  12. 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  13. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  14. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  15. 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  17. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  18. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-10-18 05:10 UTCEG score recompute
  20. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  21. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  22. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  23. 2026-10-15 14:07 UTCEG score recompute▼ 2.10
  24. 2026-10-15 14:04 UTCNVD updateCVSS v3 → 6.1 · severity → MEDIUM
  25. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
Show 32 more
  1. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  2. 2026-10-12 16:40 UTCEG score recompute
  3. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  4. 2026-10-11 20:16 UTCEG score recompute
  5. 2026-10-11 18:28 UTCEG score recompute
  6. 2026-10-11 15:02 UTCEG score recompute
  7. 2026-10-10 22:16 UTCEG score recompute
  8. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  9. 2026-10-09 21:01 UTCEG score recompute
  10. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  11. 2026-10-08 19:50 UTCEG score recompute
  12. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  13. 2026-10-08 06:04 UTCEG score recompute
  14. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  15. 2026-10-06 16:01 UTCEG score recompute
  16. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  17. 2026-10-06 03:25 UTCEG score recompute
  18. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  19. 2026-10-05 02:13 UTCEG score recompute
  20. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  21. 2026-10-04 01:03 UTCEG score recompute
  22. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  23. 2026-10-02 23:52 UTCEG score recompute
  24. 2026-10-01 22:39 UTCEG score recompute
  25. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  26. 2026-09-30 21:29 UTCEG score recompute
  27. 2026-09-30 20:27 UTCEG score recompute
  28. 2026-09-30 18:47 UTCEG score recompute
  29. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  30. 2026-09-29 17:31 UTCEG score recompute
  31. 2026-09-29 16:45 UTCEG score recomputeFirst assessed: 8.2 HIGH
  32. 2026-09-29 16:43 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-102673?
CVE-2026-102673 is a high-severity vulnerability; its CVE record was published on September 29, 2026. Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 41.10.4, 42.5.2, and 43.0.0, popups opened from a sandboxed iframe through Electron's OpenURLFromTab navigation path, including links using target="_blank" or a middle-click, did not…
When was the CVE record for CVE-2026-102673 published?
The CVE record for CVE-2026-102673 was published on September 29, 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 15, 2026; the record at its source may have been updated since.
Is CVE-2026-102673 actively exploited?
CVE-2026-102673 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (2nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-102673?
CVE-2026-102673 has a CVSS v3 base score of 6.1 (NVD). EchelonGraph synthesises NVD + FIRST EPSS + GHSA into a combined EG score of 8.2 (HIGH).
How do I remediate CVE-2026-102673?
A fix for CVE-2026-102673 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-102673 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-102673

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