CVE-2026-77083

MEDIUMNVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

Score 5.9 from GitHub Security Advisory published 2026-08-20. NVD baseline CVSS 5.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 5.9Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

n8n is a workflow automation platform. In versions prior to 1.123.69, 2.33.4, and 2.34.1, the JavaScript Code node's VM sandbox did not freeze the sandbox's Function.prototype, allowing an authenticated user with the ability to create and execute workflows to pollute it from within a Code node execution and recover a reference to the host's globalThis, resulting in a sandbox escape. The full exploit chain additionally depends on specific modules being available as allowlisted imports in the deployment's configuration. The issue is fixed in versions 1.123.69, 2.33.4, and 2.34.1.

CVSS v3
5.9
EG Score
5.9MEDIUMmedium confidence
EG Risk
27
EG Risk 27/100CISA 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
Severity59% × 45%
Exploitation0% × 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
0.4%
EPSS %ILE
28th
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 20, 2026

Last Modified

September 1, 2026

Advisory Details (2)

Auto-updated Aug 20, 2026
Patch available. Sources: github.
generic Patch Available

n8n is a workflow automation platform. In versions prior to 1.123.69, 2.33.4, and 2.34.1, the JavaScript Code node's VM sandbox did not freeze the sandbox's Function.prototype, allowing an authenticated user with the ability to create and execute workflows to pollute it from within a Code node execution and recover a reference to the host's globalThis, resulting in a sandbox escape. The full exploit chain additionally depends on specific modules being available as allowlisted imports in the depl...

n8n is a workflow automation platform. In versions prior to 1.123.69, 2.33.4, and 2.34.1, the JavaScript Code node's VM sandbox did not freeze the sandbox's Function.prototype, allowing an authenticated user with the ability to create and execute workflows to pollute it from within a Code node execution and recover a reference to the host's globalThis, resulting in a sandbox escape. The full exploit chain additionally depends on specific modules being available as allowlisted imports in the deployment's configuration. The issue is fixed in versions 1.123.69, 2.33.4, and 2.34.1. | Advisories | VulnCheck

https://www.vulncheck.com/advisories/n8n-before-code-node-sandbox-escape-via-function.prototype-pollution
github Patch Available

Sandbox Escape in JavaScript Code Node via Prototype Pollution · Advisory · n8n-io/n8n · GitHub

https://github.com/n8n-io/n8n/security/advisories/GHSA-c9c6-rq46-h25v

Vendor Advisories for CVE-2026-77083(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 79× 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 134 total refreshes for this CVE.

  1. 2026-10-05 01:48 UTCEG score recompute
  2. 2026-10-05 01:48 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 03:30 UTCEG score recompute
  5. 2026-10-04 03:30 UTCGHSA enrichment
  6. 2026-10-03 14:26 UTCEPSS rescore
  7. 2026-10-03 05:11 UTCEG score recompute
  8. 2026-10-03 05:11 UTCGHSA enrichment
  9. 2026-10-02 06:50 UTCEG score recompute
  10. 2026-10-02 06:50 UTCGHSA enrichment
  11. 2026-10-01 19:50 UTCEPSS rescore
  12. 2026-10-01 06:43 UTCEG score recompute
  13. 2026-10-01 06:43 UTCGHSA enrichment
  14. 2026-09-30 08:24 UTCEG score recompute
  15. 2026-09-30 08:24 UTCGHSA enrichment
  16. 2026-09-29 15:24 UTCEPSS rescore
  17. 2026-09-29 00:28 UTCEG score recompute
  18. 2026-09-29 00:28 UTCGHSA enrichment
  19. 2026-09-28 13:52 UTCEPSS rescore
  20. 2026-09-28 02:00 UTCEG score recompute
  21. 2026-09-28 02:00 UTCGHSA enrichment
  22. 2026-09-27 13:48 UTCEPSS rescore
  23. 2026-09-27 03:25 UTCEG score recompute
  24. 2026-09-27 03:25 UTCGHSA enrichment
  25. 2026-09-26 15:59 UTCEPSS rescore
Show 75 more
  1. 2026-09-26 00:28 UTCEPSS rescore
  2. 2026-09-25 01:05 UTCEG score recompute
  3. 2026-09-25 01:05 UTCGHSA enrichment
  4. 2026-09-24 14:04 UTCEPSS rescore
  5. 2026-09-24 02:46 UTCEG score recompute
  6. 2026-09-24 02:46 UTCGHSA enrichment
  7. 2026-09-23 17:54 UTCEPSS rescore
  8. 2026-09-23 04:28 UTCEG score recompute
  9. 2026-09-23 04:28 UTCGHSA enrichment
  10. 2026-09-22 16:01 UTCEPSS rescore
  11. 2026-09-22 06:10 UTCEG score recompute
  12. 2026-09-22 06:10 UTCGHSA enrichment
  13. 2026-09-21 21:09 UTCEPSS rescore
  14. 2026-09-21 07:51 UTCEG score recompute
  15. 2026-09-21 07:51 UTCGHSA enrichment
  16. 2026-09-20 20:16 UTCEPSS rescore
  17. 2026-09-20 09:03 UTCEG score recompute
  18. 2026-09-20 09:03 UTCGHSA enrichment
  19. 2026-09-19 08:07 UTCEG score recompute
  20. 2026-09-19 08:07 UTCGHSA enrichment
  21. 2026-09-18 19:28 UTCEPSS rescore
  22. 2026-09-18 09:49 UTCEG score recompute
  23. 2026-09-18 09:49 UTCGHSA enrichment
  24. 2026-09-17 11:30 UTCEG score recompute
  25. 2026-09-17 11:30 UTCGHSA enrichment
  26. 2026-09-16 14:08 UTCEPSS rescore
  27. 2026-09-16 13:12 UTCEG score recompute
  28. 2026-09-16 13:11 UTCGHSA enrichment
  29. 2026-09-16 05:15 UTCEPSS rescore
  30. 2026-09-15 14:51 UTCEG score recompute
  31. 2026-09-15 14:51 UTCGHSA enrichment
  32. 2026-09-15 03:12 UTCEPSS rescore
  33. 2026-09-14 16:32 UTCGHSA enrichment
  34. 2026-09-13 18:14 UTCEG score recompute
  35. 2026-09-13 18:14 UTCGHSA enrichment
  36. 2026-09-12 19:55 UTCEG score recompute
  37. 2026-09-12 19:55 UTCGHSA enrichment
  38. 2026-09-12 15:02 UTCEPSS rescore
  39. 2026-09-11 21:37 UTCEG score recompute
  40. 2026-09-11 21:37 UTCGHSA enrichment
  41. 2026-09-11 14:53 UTCEPSS rescore
  42. 2026-09-10 23:18 UTCEG score recompute
  43. 2026-09-10 23:18 UTCGHSA enrichment
  44. 2026-09-10 09:35 UTCEPSS rescore
  45. 2026-09-10 00:52 UTCGHSA enrichment
  46. 2026-09-09 02:05 UTCEG score recompute
  47. 2026-09-09 02:05 UTCGHSA enrichment
  48. 2026-09-08 22:01 UTCEPSS rescore
  49. 2026-09-07 15:35 UTCGHSA enrichment
  50. 2026-09-06 14:29 UTCEG score recompute
  51. 2026-09-06 14:29 UTCGHSA enrichment
  52. 2026-09-06 13:48 UTCEPSS rescore
  53. 2026-09-05 16:10 UTCEG score recompute
  54. 2026-09-05 16:10 UTCGHSA enrichment
  55. 2026-09-04 17:52 UTCEG score recompute
  56. 2026-09-04 17:52 UTCGHSA enrichment
  57. 2026-09-04 05:07 UTCEPSS rescore
  58. 2026-09-03 19:32 UTCGHSA enrichment
  59. 2026-09-02 21:12 UTCEG score recompute
  60. 2026-09-02 21:12 UTCGHSA enrichment
  61. 2026-09-02 14:12 UTCEPSS rescore
  62. 2026-09-01 20:02 UTCEG score recompute▼ 0.10
  63. 2026-09-01 20:02 UTCGHSA enrichment
  64. 2026-09-01 20:02 UTCNVD updateCVSS v3 → 5.9
  65. 2026-09-01 18:53 UTCEG score recompute
  66. 2026-09-01 18:52 UTCGHSA enrichment
  67. 2026-09-01 13:54 UTCEPSS rescore
  68. 2026-09-01 04:40 UTCEPSS rescore
  69. 2026-09-01 04:40 UTCEPSS rescore
  70. 2026-08-31 20:25 UTCGHSA enrichment
  71. 2026-08-30 22:09 UTCEG score recompute
  72. 2026-08-30 22:09 UTCGHSA enrichment
  73. 2026-08-30 19:18 UTCEPSS rescore
  74. 2026-08-30 19:17 UTCEPSS rescore
  75. 2026-08-30 01:22 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-77083?
CVE-2026-77083 is a medium vulnerability published on August 20, 2026. n8n is a workflow automation platform. In versions prior to 1.123.69, 2.33.4, and 2.34.1, the JavaScript Code node's VM sandbox did not freeze the sandbox's Function.prototype, allowing an authenticated user with the ability to create and execute workflows to pollute it from within a Code node…
When was CVE-2026-77083 disclosed?
CVE-2026-77083 was first published on August 20, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77083 actively exploited?
CVE-2026-77083 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (28th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-77083?
CVE-2026-77083 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2026-77083?
A fix for CVE-2026-77083 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-77083 are linked in the Vendor Advisories panel on this page.

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