CVE-2026-43942

MEDIUMNVD 5.56.5▲
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-05-08. NVD baseline CVSS 5.5; sources differ by 1.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 5.5Exploit: None knownExposed services: Not assessed

A fixed version is listed under Patch Availability — apply it.

electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. In versions 3.8.15 and prior, the getConstants() IPC handler in src/app/lib/ipc-sync.js serialises the entire process.env object and sends it to the renderer. The data is stored as window.pre.env and is accessible from any JavaScript running in the renderer (e.g., via the DevTools console or a compromised webview context). An attacker who achieves any JavaScript execution within the renderer can trivially exfiltrate these secrets to a remote server, leading to cloud account compromise, supply chain attacks, and lateral movement. At time of publication, there are no publicly available patches.

CVSS v3
5.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100

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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
EPSS PROB
0.1%
EPSS %ILE
1st
KEV
Not listed

Published

May 8, 2026

Last Modified

May 8, 2026

Advisory Details (1)

Auto-updated May 8, 2026
Fixed version listed under Patch Availability. Sources: github.
githubMentions a patch (unverified)

Full process.env exposed to renderer via window.pre.env in electerm · Advisory · electerm/electerm · GitHub

https://github.com/electerm/electerm/security/advisories/GHSA-37j4-88rp-2f6h

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
npmelecterm—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
electerm—
  • every version through 3.8.15: no fix on record
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 19× 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.

Showing the most recent 100 of 166 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-43942?
CVE-2026-43942 is a medium vulnerability published on May 8, 2026. electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. In versions 3.8.15 and prior, the getConstants() IPC handler in src/app/lib/ipc-sync.js serialises the entire process.env object and sends it to the renderer. The data is stored as window.pre.env and is…
When was CVE-2026-43942 disclosed?
CVE-2026-43942 was first published on May 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43942 actively exploited?
CVE-2026-43942 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-43942?
CVE-2026-43942 has a CVSS v3 base score of 5.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.5 (MEDIUM).
How do I remediate CVE-2026-43942?
A fixed version for CVE-2026-43942 is listed under Patch Availability on this page: update to the version listed for your package.

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