CVE-2026-43941

CRITICALNVD 9.69.6—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.6 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 67% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
9.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 9.6Exploit: 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, Electerm's terminal hyperlink handler passes any URL clicked in the terminal directly to shell.openExternal without any protocol validation. An attacker who controls terminal output (e.g., via a malicious SSH server, compromised remote host, or malicious plugin rendering terminal content) can thus achieve arbitrary code execution or local file access on the victim's machine, requiring only that the victim clicks a displayed link. At time of publication, there are no publicly available patches.

CVSS v3
9.6
EG Score
9.6CRITICALmedium confidence
EG Risk
43
EG Risk 43/100

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
Severity96% × 45%
Exploitation0% × 40%
Automatability0% × 15%
EPSS PROB
0.5%
EPSS %ILE
41st
KEV
Not listed

Published

May 8, 2026

Last Modified

May 8, 2026

Advisory Details (1)

Auto-updated Oct 2, 2026
Fixed version listed under Patch Availability. Sources: github.
githubMentions a patch (unverified)

Unvalidated shell.openExternal in electerm allows arbitrary protocol execution via terminal link click · Advisory · electerm/electerm · GitHub

https://github.com/electerm/electerm/security/advisories/GHSA-fwf6-j56g-m97c

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 / 23× 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 249 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. 2026-10-03 14:25 UTCEPSS rescore
  8. 2026-10-01 19:50 UTCEPSS rescore
  9. 2026-09-30 15:03 UTCEPSS rescore
  10. 2026-09-30 08:28 UTCOSV refresh
  11. 2026-09-27 13:48 UTCEPSS rescore
  12. 2026-09-26 15:58 UTCEPSS rescore
  13. 2026-09-23 17:53 UTCEPSS rescore
  14. 2026-09-20 20:15 UTCEPSS rescore
  15. 2026-09-18 19:28 UTCEPSS rescore
  16. 2026-09-17 19:31 UTCEPSS rescore
  17. 2026-09-16 14:08 UTCEPSS rescore
  18. 2026-09-16 05:15 UTCEPSS rescore
  19. 2026-09-13 16:47 UTCEPSS rescore
  20. 2026-09-12 15:01 UTCEPSS rescore
  21. 2026-09-11 15:10 UTCOSV refresh
  22. 2026-09-11 14:53 UTCEPSS rescore
  23. 2026-09-11 09:37 UTCEPSS rescore
  24. 2026-09-10 09:34 UTCEPSS rescore
  25. 2026-09-08 22:00 UTCEPSS rescore
Show 75 more
  1. 2026-09-07 16:01 UTCEPSS rescore
  2. 2026-09-06 13:47 UTCEPSS rescore
  3. 2026-09-04 05:06 UTCEPSS rescore
  4. 2026-09-02 14:12 UTCEPSS rescore
  5. 2026-09-01 13:54 UTCEPSS rescore
  6. 2026-08-30 19:17 UTCEPSS rescore
  7. 2026-08-30 01:22 UTCEPSS rescore
  8. 2026-08-28 21:41 UTCEPSS rescore
  9. 2026-08-27 14:25 UTCEPSS rescore
  10. 2026-08-26 14:46 UTCEPSS rescore
  11. 2026-08-25 13:49 UTCEPSS rescore
  12. 2026-08-23 19:30 UTCEG score recompute
  13. 2026-08-23 19:30 UTCGHSA enrichment
  14. 2026-08-23 00:19 UTCEPSS rescore
  15. 2026-08-21 23:49 UTCEPSS rescore
  16. 2026-08-20 22:55 UTCEPSS rescore
  17. 2026-08-19 17:04 UTCEPSS rescore
  18. 2026-08-18 13:48 UTCEPSS rescore
  19. 2026-08-17 13:47 UTCEPSS rescore
  20. 2026-08-17 11:59 UTCEG score recompute
  21. 2026-08-17 11:59 UTCGHSA enrichment
  22. 2026-08-16 14:56 UTCEPSS rescore
  23. 2026-08-16 12:03 UTCGHSA enrichment
  24. 2026-08-16 08:22 UTCGHSA enrichment
  25. 2026-08-16 04:41 UTCEG score recompute
  26. 2026-08-16 04:41 UTCGHSA enrichment
  27. 2026-08-16 02:14 UTCEPSS rescore
  28. 2026-08-15 01:30 UTCEPSS rescore
  29. 2026-08-15 01:26 UTCGHSA enrichment
  30. 2026-08-14 21:43 UTCGHSA enrichment
  31. 2026-08-14 18:02 UTCGHSA enrichment
  32. 2026-08-14 14:20 UTCGHSA enrichment
  33. 2026-08-14 10:39 UTCGHSA enrichment
  34. 2026-08-14 06:57 UTCGHSA enrichment
  35. 2026-08-14 03:16 UTCEG score recompute
  36. 2026-08-14 03:16 UTCGHSA enrichment
  37. 2026-08-13 22:00 UTCEPSS rescore
  38. 2026-08-13 08:20 UTCGHSA enrichment
  39. 2026-08-13 03:55 UTCGHSA enrichment
  40. 2026-08-13 00:14 UTCGHSA enrichment
  41. 2026-08-12 20:32 UTCGHSA enrichment
  42. 2026-08-12 16:51 UTCEG score recompute
  43. 2026-08-12 16:51 UTCGHSA enrichment
  44. 2026-08-12 13:51 UTCEPSS rescore
  45. 2026-08-11 23:24 UTCGHSA enrichment
  46. 2026-08-11 19:42 UTCGHSA enrichment
  47. 2026-08-11 15:54 UTCEG score recompute
  48. 2026-08-11 15:54 UTCGHSA enrichment
  49. 2026-08-11 13:43 UTCEPSS rescore
  50. 2026-08-11 08:44 UTCGHSA enrichment
  51. 2026-08-11 05:03 UTCGHSA enrichment
  52. 2026-08-11 01:21 UTCEG score recompute
  53. 2026-08-11 01:21 UTCGHSA enrichment
  54. 2026-08-11 00:00 UTCEPSS rescore
  55. 2026-08-10 12:17 UTCGHSA enrichment
  56. 2026-08-10 08:36 UTCGHSA enrichment
  57. 2026-08-10 04:55 UTCGHSA enrichment
  58. 2026-08-10 01:14 UTCGHSA enrichment
  59. 2026-08-09 21:33 UTCGHSA enrichment
  60. 2026-08-09 17:52 UTCGHSA enrichment
  61. 2026-08-09 14:11 UTCEG score recompute
  62. 2026-08-09 14:11 UTCGHSA enrichment
  63. 2026-08-09 13:46 UTCEPSS rescore
  64. 2026-08-09 10:29 UTCGHSA enrichment
  65. 2026-08-09 06:08 UTCGHSA enrichment
  66. 2026-08-09 02:27 UTCEG score recompute
  67. 2026-08-09 02:27 UTCGHSA enrichment
  68. 2026-08-08 16:37 UTCEPSS rescore
  69. 2026-08-08 10:52 UTCGHSA enrichment
  70. 2026-08-08 07:01 UTCGHSA enrichment
  71. 2026-08-08 03:20 UTCGHSA enrichment
  72. 2026-08-07 23:39 UTCGHSA enrichment
  73. 2026-08-07 19:58 UTCEG score recompute
  74. 2026-08-07 19:58 UTCGHSA enrichment
  75. 2026-08-07 16:16 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2026-43941?
CVE-2026-43941 is a critical 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, Electerm's terminal hyperlink handler passes any URL clicked in the terminal directly to shell.openExternal without any protocol validation. An attacker who controls terminal…
When was CVE-2026-43941 disclosed?
CVE-2026-43941 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-2026-43941 actively exploited?
CVE-2026-43941 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (41st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-43941?
CVE-2026-43941 has a CVSS v3 base score of 9.6 (NVD).
How do I remediate CVE-2026-43941?
A fixed version for CVE-2026-43941 is listed under Patch Availability on this page: update to the version listed for your package.

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