CVE-2026-77083

MEDIUMNVD 5.95.9—
EchelonGraph scoreHIGH 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%CVSS: 5.9Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
5.9(high)
EG Risk
27(Track)
EG Risk 27/100SSVC: Track

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%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
14%
KEV
Not listed

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 17× in last 7d / 84× 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. 2026-09-19 08:07 UTCEG score recompute
  2. 2026-09-19 08:07 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 09:49 UTCEG score recompute
  5. 2026-09-18 09:49 UTCGHSA enrichment
  6. 2026-09-17 11:30 UTCEG score recompute
  7. 2026-09-17 11:30 UTCGHSA enrichment
  8. 2026-09-16 14:08 UTCEPSS rescore
  9. 2026-09-16 13:12 UTCEG score recompute
  10. 2026-09-16 13:11 UTCGHSA enrichment
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-15 14:51 UTCEG score recompute
  13. 2026-09-15 14:51 UTCGHSA enrichment
  14. 2026-09-15 03:12 UTCEPSS rescore
  15. 2026-09-14 16:32 UTCGHSA enrichment
  16. 2026-09-13 18:14 UTCEG score recompute
  17. 2026-09-13 18:14 UTCGHSA enrichment
  18. 2026-09-12 19:55 UTCEG score recompute
  19. 2026-09-12 19:55 UTCGHSA enrichment
  20. 2026-09-12 15:02 UTCEPSS rescore
  21. 2026-09-11 21:37 UTCEG score recompute
  22. 2026-09-11 21:37 UTCGHSA enrichment
  23. 2026-09-11 14:53 UTCEPSS rescore
  24. 2026-09-10 23:18 UTCEG score recompute
  25. 2026-09-10 23:18 UTCGHSA enrichment
Show 66 more
  1. 2026-09-10 09:35 UTCEPSS rescore
  2. 2026-09-10 00:52 UTCGHSA enrichment
  3. 2026-09-09 02:05 UTCEG score recompute
  4. 2026-09-09 02:05 UTCGHSA enrichment
  5. 2026-09-08 22:01 UTCEPSS rescore
  6. 2026-09-07 15:35 UTCGHSA enrichment
  7. 2026-09-06 14:29 UTCEG score recompute
  8. 2026-09-06 14:29 UTCGHSA enrichment
  9. 2026-09-06 13:48 UTCEPSS rescore
  10. 2026-09-05 16:10 UTCEG score recompute
  11. 2026-09-05 16:10 UTCGHSA enrichment
  12. 2026-09-04 17:52 UTCEG score recompute
  13. 2026-09-04 17:52 UTCGHSA enrichment
  14. 2026-09-04 05:07 UTCEPSS rescore
  15. 2026-09-03 19:32 UTCGHSA enrichment
  16. 2026-09-02 21:12 UTCEG score recompute
  17. 2026-09-02 21:12 UTCGHSA enrichment
  18. 2026-09-02 14:12 UTCEPSS rescore
  19. 2026-09-01 20:02 UTCEG score recompute▼ 0.10
  20. 2026-09-01 20:02 UTCGHSA enrichment
  21. 2026-09-01 20:02 UTCNVD updateCVSS v3 → 5.9
  22. 2026-09-01 18:53 UTCEG score recompute
  23. 2026-09-01 18:52 UTCGHSA enrichment
  24. 2026-09-01 13:54 UTCEPSS rescore
  25. 2026-09-01 04:40 UTCEPSS rescore
  26. 2026-09-01 04:40 UTCEPSS rescore
  27. 2026-08-31 20:25 UTCGHSA enrichment
  28. 2026-08-30 22:09 UTCEG score recompute
  29. 2026-08-30 22:09 UTCGHSA enrichment
  30. 2026-08-30 19:18 UTCEPSS rescore
  31. 2026-08-30 19:17 UTCEPSS rescore
  32. 2026-08-30 01:22 UTCEPSS rescore
  33. 2026-08-29 23:50 UTCGHSA enrichment
  34. 2026-08-29 01:32 UTCEG score recompute
  35. 2026-08-29 01:32 UTCGHSA enrichment
  36. 2026-08-28 21:42 UTCEPSS rescore
  37. 2026-08-28 00:45 UTCEG score recompute
  38. 2026-08-28 00:45 UTCGHSA enrichment
  39. 2026-08-27 14:25 UTCEPSS rescore
  40. 2026-08-27 02:13 UTCEG score recompute
  41. 2026-08-27 02:13 UTCGHSA enrichment
  42. 2026-08-26 14:47 UTCEPSS rescore
  43. 2026-08-26 03:54 UTCEG score recompute
  44. 2026-08-26 03:54 UTCGHSA enrichment
  45. 2026-08-25 13:49 UTCEPSS rescore
  46. 2026-08-25 05:36 UTCEG score recompute
  47. 2026-08-25 05:36 UTCGHSA enrichment
  48. 2026-08-24 14:18 UTCEPSS rescore
  49. 2026-08-24 07:17 UTCGHSA enrichment
  50. 2026-08-23 08:56 UTCEG score recompute
  51. 2026-08-23 08:56 UTCGHSA enrichment
  52. 2026-08-23 00:19 UTCEPSS rescore
  53. 2026-08-22 10:38 UTCEG score recompute
  54. 2026-08-22 10:38 UTCGHSA enrichment
  55. 2026-08-21 23:49 UTCEPSS rescore
  56. 2026-08-21 12:19 UTCEG score recompute
  57. 2026-08-21 12:19 UTCGHSA enrichment
  58. 2026-08-21 11:30 UTCEG score recompute
  59. 2026-08-21 11:30 UTCGHSA enrichment
  60. 2026-08-20 15:27 UTCEG score recompute
  61. 2026-08-20 15:27 UTCGHSA enrichment
  62. 2026-08-20 14:57 UTCEG score recompute
  63. 2026-08-20 14:57 UTCGHSA enrichment
  64. 2026-08-20 12:20 UTCEG score recompute
  65. 2026-08-20 11:37 UTCEG score recompute
  66. 2026-08-20 11:36 UTCMITRE cvelistV5first tracked

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 in the National Vulnerability Database 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% probability of exploitation in the next 30 days, which ranks it in the top 86.4% of all 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?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-77083, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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