CVE-2026-70612

MEDIUMPre-NVD 5.45.4
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 5.4 from GitHub Security Advisory (severity: MODERATE) published 2026-08-05. A secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2026-53546 (ENISA EUVD) · GHSA-p2rr-rvmm-c5fp (GitHub Security Advisories)Source: ENISA EUVD

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: 0.4%CVSS: 5.4Exploit: 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 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3, requests to open external protocol URLs from web content did not take iframe sandbox restrictions into account, so a sandboxed iframe could cause an OS-registered external application to be launched. The frame sandbox state was also not made available to the app permission handlers, affecting apps that render untrusted content in sandboxed iframes and grant the openExternal permission by default when no setPermissionRequestHandler is installed. This issue is fixed in 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3.

CVSS v3
5.4
EG Score
5.4MEDIUMmedium 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.
Exploitation0.4% × 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
0.4%
EPSS %ILE
37th
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.GitHub Security Advisory CVSS
EG Likelihood
0.4% 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

August 5, 2026

Last Modified

October 8, 2026

Advisory Details (10)

Auto-updated Aug 5, 2026
Patch available. Sources: github_commit, github_pr, github_release.
GitHub release Patch Available

electron v40.9.0

Patch available: electron/electron v40.9.0

https://github.com/electron/electron/releases/tag/v40.9.0
GitHub release Patch Available

electron v39.8.8

Patch available: electron/electron v39.8.8

https://github.com/electron/electron/releases/tag/v39.8.8
GitHub pull request

fix: respect iframe sandbox flags for external protocol navigation

Fix merged in electron/electron PR #50964 on 2026-04-12 — awaiting tagged release

https://github.com/electron/electron/pull/50964
GitHub pull request

fix: respect iframe sandbox flags for external protocol navigation

Fix merged in electron/electron PR #50963 on 2026-04-12 — awaiting tagged release

https://github.com/electron/electron/pull/50963
GitHub pull request

fix: respect iframe sandbox flags for external protocol navigation

Fix merged in electron/electron PR #50962 on 2026-04-12 — awaiting tagged release

https://github.com/electron/electron/pull/50962
GitHub pull request

fix: respect iframe sandbox flags for external protocol navigation

Fix merged in electron/electron PR #50961 on 2026-04-12 — awaiting tagged release

https://github.com/electron/electron/pull/50961
GitHub commit

commit c39e3d5687d5 (electron/electron)

Fix landed in electron/electron commit c39e3d5687d5 — awaiting tagged release

https://github.com/electron/electron/commit/c39e3d5687d57434c8d5fe814c5152efd2f631c3
GitHub commit

commit 477dcf7afc65 (electron/electron)

Fix landed in electron/electron commit 477dcf7afc65 — awaiting tagged release

https://github.com/electron/electron/commit/477dcf7afc6550715f9ec5e6f39ee38e5dd7bf39
GitHub commit

commit 2764e4c35168 (electron/electron)

Fix landed in electron/electron commit 2764e4c35168 — awaiting tagged release

https://github.com/electron/electron/commit/2764e4c35168855f614876051823db4f58a3714a
GitHub commit

commit 08b9d0a220e2 (electron/electron)

Fix landed in electron/electron commit 08b9d0a220e2 — awaiting tagged release

https://github.com/electron/electron/commit/08b9d0a220e267d1a2402a44bdd01a2e9aa320b5

Vendor Advisories for CVE-2026-70612(1)

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

Patch Availability(4)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
npmelectron @ 39.8.8 (fixes < 39.8.8)—ghsa
npmelectron @ 40.9.0 (fixes >= 40.0.0-alpha.1, < 40.9.0)—ghsa
npmelectron @ 41.2.1 (fixes >= 41.0.0-alpha.1, < 41.2.1)—ghsa
npmelectron @ 42.0.0-beta.3 (fixes >= 42.0.0-alpha.1, < 42.0.0-beta.3)—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 39.8.8: fixed in 39.8.8
  • 40.0.0-alpha.1 up to 40.9.0: fixed in 40.9.0
  • 41.0.0-alpha.1 up to 41.2.1: fixed in 41.2.1
  • 42.0.0-alpha.1 up to 42.0.0-beta.3: fixed in 42.0.0-beta.3
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 32× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 149 rows on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 49 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:57 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  2. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  3. 2026-11-11 16:40 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  4. 2026-11-10 16:45 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  5. 2026-11-09 16:36 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  6. 2026-11-08 16:40 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  7. 2026-11-07 16:39 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  8. 2026-11-06 16:39 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  9. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  10. 2026-11-04 16:36 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  11. 2026-11-03 16:49 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  12. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  13. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  14. 2026-11-01 07:40 UTCGHSA enrichmentGHSA-p2rr-rvmm-c5fp · GitHub severity MODERATE · GitHub CVSS 5.4
  15. 2026-11-01 07:40 UTCEchelonGraph re-scored
  16. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  17. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  18. 2026-10-30 07:25 UTCOSV refresh
  19. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  20. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  21. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  22. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  23. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  24. 2026-10-25 14:08 UTCEchelonGraph re-scored
  25. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
Show 75 more
  1. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  2. 2026-10-22 19:29 UTCEchelonGraph re-scored
  3. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  4. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  5. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  6. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  7. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  8. 2026-10-18 03:18 UTCEchelonGraph re-scored
  9. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  10. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  11. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  12. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  13. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  14. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  15. 2026-10-12 15:43 UTCEchelonGraph re-scored
  16. 2026-10-11 19:29 UTCEchelonGraph re-scored
  17. 2026-10-11 16:44 UTCEchelonGraph re-scored
  18. 2026-10-11 14:04 UTCEchelonGraph re-scored
  19. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  20. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  21. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  22. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  23. 2026-10-08 14:09 UTCEchelonGraph re-scored
  24. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  25. 2026-10-06 23:36 UTCEchelonGraph re-scored
  26. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  27. 2026-10-05 19:33 UTCEchelonGraph re-scored
  28. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  29. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  30. 2026-10-04 05:58 UTCEchelonGraph re-scored
  31. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  32. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  33. 2026-10-02 09:52 UTCEchelonGraph re-scored
  34. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  35. 2026-10-01 02:15 UTCEchelonGraph re-scored
  36. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  37. 2026-09-29 06:13 UTCEchelonGraph re-scored
  38. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  39. 2026-09-27 17:39 UTCEchelonGraph re-scored
  40. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  41. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  42. 2026-09-25 04:30 UTCEchelonGraph re-scored
  43. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  44. 2026-09-23 14:11 UTCEchelonGraph re-scored
  45. 2026-09-22 13:03 UTCEchelonGraph re-scored
  46. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  47. 2026-09-21 13:13 UTCEchelonGraph re-scored
  48. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  49. 2026-09-20 03:20 UTCEchelonGraph re-scored
  50. 2026-09-19 03:30 UTCEchelonGraph re-scored
  51. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  52. 2026-09-18 03:40 UTCEchelonGraph re-scored
  53. 2026-09-17 03:51 UTCEchelonGraph re-scored
  54. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  55. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  56. 2026-09-16 03:10 UTCEchelonGraph re-scored
  57. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  58. 2026-09-14 01:37 UTCEchelonGraph re-scored
  59. 2026-09-13 01:48 UTCEchelonGraph re-scored
  60. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  61. 2026-09-12 01:58 UTCEchelonGraph re-scored
  62. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  63. 2026-09-11 02:08 UTCEchelonGraph re-scored
  64. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  65. 2026-09-10 02:18 UTCEchelonGraph re-scored
  66. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  67. 2026-09-07 18:12 UTCEchelonGraph re-scored
  68. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  69. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  70. 2026-09-06 09:24 UTCEchelonGraph re-scored
  71. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  72. 2026-09-05 09:18 UTCEchelonGraph re-scored
  73. 2026-09-04 09:28 UTCEchelonGraph re-scored
  74. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  75. 2026-09-03 06:44 UTCEchelonGraph re-scored

Frequently asked(5)

What is CVE-2026-70612?
CVE-2026-70612 is a medium-severity vulnerability; its CVE record was published on August 5, 2026. Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3, requests to open external protocol URLs from web content did not take iframe sandbox restrictions into account, so a sandboxed iframe could…
When was the CVE record for CVE-2026-70612 published?
The CVE record for CVE-2026-70612 was published on August 5, 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 8, 2026; the record at its source may have been updated since.
Is CVE-2026-70612 actively exploited?
CVE-2026-70612 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-70612?
CVE-2026-70612 has a CVSS base score of 5.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-70612?
A fix for CVE-2026-70612 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-70612 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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