CVE-2026-70610

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6% (45th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.6%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 39.8.9, 40.9.2, 41.2.2, and 42.0.0-beta.4, objects copied across the contextBridge boundary from untrusted content could carry an attacker-influenced prototype, enabling prototype-pollution-style attacks against preload code despite context isolation being enabled. Apps are only affected if their preload code accepts object arguments from untrusted content and reads properties from them without own-property checks, while apps that only accept primitive arguments or validate object arguments are not affected. This issue is fixed in 39.8.9, 40.9.2, 41.2.2, and 42.0.0-beta.4.

CVSS v3
5.4
EG Score
5.4MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity54% × 45%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.6%
EPSS %ILE
45th
KEV
Not listed

CISA SSVCTrack 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). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 5, 2026

Last Modified

September 8, 2026

Advisory Details (10)

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

electron v39.8.9

Patch available: electron/electron v39.8.9

https://github.com/electron/electron/releases/tag/v39.8.9
github_commit

commit 5b699544cbbe (electron/electron)

Fix landed in electron/electron commit 5b699544cbbe — awaiting tagged release

https://github.com/electron/electron/commit/5b699544cbbed51bedb7c60d75c8c42be5825737
github_commit

commit 4ac50292d552 (electron/electron)

Fix landed in electron/electron commit 4ac50292d552 — awaiting tagged release

https://github.com/electron/electron/commit/4ac50292d552fb510eb778392620c85308770a55
github_commit

commit 23a6efb714de (electron/electron)

Fix landed in electron/electron commit 23a6efb714de — awaiting tagged release

https://github.com/electron/electron/commit/23a6efb714dec80e2cf45d3054d18d701162e4dd
github_commit

commit 17d5d26499cd (electron/electron)

Fix landed in electron/electron commit 17d5d26499cd — awaiting tagged release

https://github.com/electron/electron/commit/17d5d26499cd279fab48f5f26527f8edc02a7713
github_pr

fix: use CreateDataProperty when copying objects across contextBridge

Fix merged in electron/electron PR #51086 on 2026-04-16 — awaiting tagged release

https://github.com/electron/electron/pull/51086
github_pr

fix: use CreateDataProperty when copying objects across contextBridge

Fix merged in electron/electron PR #51085 on 2026-04-16 — awaiting tagged release

https://github.com/electron/electron/pull/51085
github_pr

fix: use CreateDataProperty when copying objects across contextBridge

Fix merged in electron/electron PR #51084 on 2026-04-16 — awaiting tagged release

https://github.com/electron/electron/pull/51084
github_pr

fix: use CreateDataProperty when copying objects across contextBridge

Fix merged in electron/electron PR #51083 on 2026-04-16 — awaiting tagged release

https://github.com/electron/electron/pull/51083
github Patch Available

contextBridge object copy incorrectly honours setters on prototype · Advisory · electron/electron · GitHub

https://github.com/electron/electron/security/advisories/GHSA-ff2p-hmqr-hxm4

Vendor Advisories for CVE-2026-70610(1)

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

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
electron—
  • every version up to 39.8.9: fixed in 39.8.9
  • 40.0.0-alpha.1 up to 40.9.2: fixed in 40.9.2
  • 41.0.0-alpha.1 up to 41.2.2: fixed in 41.2.2
  • 42.0.0-alpha.1 up to 42.0.0-beta.4: fixed in 42.0.0-beta.4
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 43× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

  1. 2026-10-04 05:58 UTCEG score recompute
  2. 2026-10-03 14:26 UTCEPSS rescore
  3. 2026-10-02 17:56 UTCEPSS rescore
  4. 2026-10-02 09:52 UTCEG score recompute
  5. 2026-10-01 19:50 UTCEPSS rescore
  6. 2026-10-01 02:15 UTCEG score recompute
  7. 2026-09-30 15:03 UTCEPSS rescore
  8. 2026-09-29 06:13 UTCEG score recompute
  9. 2026-09-28 13:52 UTCEPSS rescore
  10. 2026-09-27 17:39 UTCEG score recompute
  11. 2026-09-27 13:48 UTCEPSS rescore
  12. 2026-09-26 15:59 UTCEPSS rescore
  13. 2026-09-25 09:00 UTCEG score recompute
  14. 2026-09-24 09:35 UTCEG score recompute
  15. 2026-09-23 17:54 UTCEPSS rescore
  16. 2026-09-23 10:52 UTCEG score recompute
  17. 2026-09-22 11:56 UTCEG score recompute
  18. 2026-09-21 21:09 UTCEPSS rescore
  19. 2026-09-21 13:13 UTCEG score recompute
  20. 2026-09-20 20:16 UTCEPSS rescore
  21. 2026-09-19 23:14 UTCEG score recompute
  22. 2026-09-18 23:57 UTCEG score recompute
  23. 2026-09-18 19:28 UTCEPSS rescore
  24. 2026-09-18 01:06 UTCEG score recompute
  25. 2026-09-17 01:05 UTCEG score recompute
Show 75 more
  1. 2026-09-16 14:08 UTCEPSS rescore
  2. 2026-09-16 05:15 UTCEPSS rescore
  3. 2026-09-15 16:14 UTCEG score recompute
  4. 2026-09-15 03:12 UTCEPSS rescore
  5. 2026-09-14 14:04 UTCEG score recompute
  6. 2026-09-12 16:29 UTCEG score recompute
  7. 2026-09-12 15:02 UTCEPSS rescore
  8. 2026-09-11 17:45 UTCEG score recompute
  9. 2026-09-11 14:53 UTCEPSS rescore
  10. 2026-09-10 18:20 UTCEG score recompute
  11. 2026-09-10 09:35 UTCEPSS rescore
  12. 2026-09-09 19:40 UTCEG score recompute
  13. 2026-09-08 22:01 UTCEPSS rescore
  14. 2026-09-07 18:12 UTCEG score recompute
  15. 2026-09-07 16:01 UTCEPSS rescore
  16. 2026-09-06 13:47 UTCEPSS rescore
  17. 2026-09-06 06:47 UTCEG score recompute
  18. 2026-09-05 15:31 UTCEPSS rescore
  19. 2026-09-05 08:08 UTCEG score recompute
  20. 2026-09-04 09:29 UTCEG score recompute
  21. 2026-09-04 05:07 UTCEPSS rescore
  22. 2026-09-03 06:44 UTCEG score recompute
  23. 2026-09-02 14:12 UTCEPSS rescore
  24. 2026-09-01 22:06 UTCEG score recompute
  25. 2026-09-01 13:54 UTCEPSS rescore
  26. 2026-09-01 04:40 UTCEPSS rescore
  27. 2026-08-30 20:00 UTCEG score recompute
  28. 2026-08-30 19:17 UTCEPSS rescore
  29. 2026-08-30 01:22 UTCEPSS rescore
  30. 2026-08-29 21:20 UTCEG score recompute
  31. 2026-08-28 21:42 UTCEPSS rescore
  32. 2026-08-28 12:32 UTCEG score recompute
  33. 2026-08-27 09:56 UTCEG score recompute
  34. 2026-08-26 14:47 UTCEPSS rescore
  35. 2026-08-26 11:13 UTCEG score recompute
  36. 2026-08-25 13:49 UTCEPSS rescore
  37. 2026-08-25 12:33 UTCEG score recompute
  38. 2026-08-24 13:53 UTCEG score recompute
  39. 2026-08-23 15:14 UTCEG score recompute
  40. 2026-08-23 00:19 UTCEPSS rescore
  41. 2026-08-22 16:35 UTCEG score recompute
  42. 2026-08-21 23:49 UTCEPSS rescore
  43. 2026-08-21 17:56 UTCEG score recompute
  44. 2026-08-20 22:56 UTCEPSS rescore
  45. 2026-08-19 20:38 UTCEG score recompute
  46. 2026-08-19 17:04 UTCEPSS rescore
  47. 2026-08-18 21:59 UTCEG score recompute
  48. 2026-08-18 13:49 UTCEPSS rescore
  49. 2026-08-18 13:49 UTCEPSS rescore
  50. 2026-08-17 23:17 UTCEG score recompute
  51. 2026-08-17 13:47 UTCEPSS rescore
  52. 2026-08-17 00:38 UTCEG score recompute
  53. 2026-08-16 14:56 UTCEPSS rescore
  54. 2026-08-16 14:56 UTCEPSS rescore
  55. 2026-08-16 02:15 UTCEPSS rescore
  56. 2026-08-15 03:20 UTCEG score recompute
  57. 2026-08-15 01:31 UTCEPSS rescore
  58. 2026-08-14 04:40 UTCEG score recompute
  59. 2026-08-13 22:00 UTCEPSS rescore
  60. 2026-08-13 06:02 UTCEG score recompute
  61. 2026-08-12 13:51 UTCEPSS rescore
  62. 2026-08-12 07:22 UTCEG score recompute
  63. 2026-08-11 08:43 UTCEG score recompute
  64. 2026-08-11 00:00 UTCEPSS rescore
  65. 2026-08-10 10:04 UTCEG score recompute
  66. 2026-08-09 13:47 UTCEPSS rescore
  67. 2026-08-09 11:26 UTCEG score recompute
  68. 2026-08-08 16:37 UTCEPSS rescore
  69. 2026-08-08 12:47 UTCEG score recompute
  70. 2026-08-06 15:29 UTCEG score recompute
  71. 2026-08-06 14:46 UTCEG score recompute
  72. 2026-08-06 13:47 UTCEPSS rescore
  73. 2026-08-05 18:30 UTCEG score recompute
  74. 2026-08-05 17:56 UTCEG score recompute
  75. 2026-08-05 17:55 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-70610?
CVE-2026-70610 is a medium vulnerability published on August 5, 2026. Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.9, 40.9.2, 41.2.2, and 42.0.0-beta.4, objects copied across the contextBridge boundary from untrusted content could carry an attacker-influenced prototype, enabling…
When was CVE-2026-70610 disclosed?
CVE-2026-70610 was first published on August 5, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-70610 actively exploited?
CVE-2026-70610 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (45th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-70610?
CVE-2026-70610 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-2026-70610?
A fix for CVE-2026-70610 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-70610 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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