CVE-2026-65591

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 60% of all CVEs by exploit prediction. 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, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

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

n8n contains a sanitizer bypass vulnerability in the legacy expression evaluator's computed-member handler. An authenticated user with workflow create or modify permissions can craft a malicious expression to bypass the sanitizer and achieve host-level code execution as the n8n process. The legacy expression engine is the default in affected versions. Fixed in n8n 1.123.64, 2.29.8, and 2.30.1.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
40%
KEV
Not listed

Published

July 22, 2026

Last Modified

July 27, 2026

Advisory Details (2)

Auto-updated Jul 22, 2026
Patch available. Sources: github.
generic

n8n before 1.123.64 Sanitizer Bypass Remote Code Execution | Advisories | VulnCheck

https://www.vulncheck.com/advisories/n8n-before-sanitizer-bypass-remote-code-execution
github Patch Available

Legacy Expression Evaluator Sanitizer Bypass Leads to Authenticated Code Execution · Advisory · n8n-io/n8n · GitHub

https://github.com/n8n-io/n8n/security/advisories/GHSA-pm35-fqvh-cq5g

Vendor Advisories for CVE-2026-65591(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 rangeFixed inDependents
n8n—2.29.8—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 45× 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 105 total refreshes for this CVE.

  1. 2026-09-14 02:39 UTCEG score recompute
  2. 2026-09-12 17:49 UTCEG score recompute
  3. 2026-09-11 19:33 UTCEG score recompute
  4. 2026-09-11 14:53 UTCEPSS rescore
  5. 2026-09-11 09:37 UTCEPSS rescore
  6. 2026-09-10 21:41 UTCEG score recompute
  7. 2026-09-09 09:18 UTCEG score recompute
  8. 2026-09-08 22:01 UTCEPSS rescore
  9. 2026-09-07 21:43 UTCEG score recompute
  10. 2026-09-07 16:01 UTCEPSS rescore
  11. 2026-09-06 13:47 UTCEPSS rescore
  12. 2026-09-05 19:35 UTCEG score recompute
  13. 2026-09-05 15:31 UTCEPSS rescore
  14. 2026-09-05 07:16 UTCEG score recompute
  15. 2026-09-04 13:58 UTCEG score recompute
  16. 2026-09-04 05:07 UTCEPSS rescore
  17. 2026-09-02 14:12 UTCEPSS rescore
  18. 2026-09-01 23:42 UTCEG score recompute
  19. 2026-09-01 13:54 UTCEPSS rescore
  20. 2026-09-01 04:40 UTCEPSS rescore
  21. 2026-08-30 23:06 UTCEG score recompute
  22. 2026-08-30 19:17 UTCEPSS rescore
  23. 2026-08-30 12:13 UTCEG score recompute
  24. 2026-08-30 01:22 UTCEPSS rescore
  25. 2026-08-30 00:57 UTCEG score recompute
Show 75 more
  1. 2026-08-28 21:42 UTCEPSS rescore
  2. 2026-08-27 21:12 UTCEG score recompute
  3. 2026-08-26 19:58 UTCEG score recompute
  4. 2026-08-26 14:47 UTCEPSS rescore
  5. 2026-08-25 18:34 UTCEG score recompute
  6. 2026-08-25 13:49 UTCEPSS rescore
  7. 2026-08-24 20:47 UTCEG score recompute
  8. 2026-08-24 09:55 UTCEG score recompute
  9. 2026-08-23 01:17 UTCEG score recompute
  10. 2026-08-23 00:19 UTCEPSS rescore
  11. 2026-08-22 03:27 UTCEG score recompute
  12. 2026-08-21 23:49 UTCEPSS rescore
  13. 2026-08-21 05:25 UTCEG score recompute
  14. 2026-08-20 22:56 UTCEPSS rescore
  15. 2026-08-19 20:45 UTCEG score recompute
  16. 2026-08-19 17:04 UTCEPSS rescore
  17. 2026-08-18 19:12 UTCEG score recompute
  18. 2026-08-18 13:48 UTCEPSS rescore
  19. 2026-08-17 16:41 UTCEG score recompute
  20. 2026-08-17 13:47 UTCEPSS rescore
  21. 2026-08-16 18:36 UTCEG score recompute
  22. 2026-08-16 14:56 UTCEPSS rescore
  23. 2026-08-16 07:43 UTCEG score recompute
  24. 2026-08-15 09:58 UTCEG score recompute
  25. 2026-08-15 01:30 UTCEPSS rescore
  26. 2026-08-14 01:21 UTCEG score recompute
  27. 2026-08-13 22:00 UTCEPSS rescore
  28. 2026-08-12 16:37 UTCEG score recompute
  29. 2026-08-12 13:51 UTCEPSS rescore
  30. 2026-08-11 18:42 UTCEG score recompute
  31. 2026-08-11 07:49 UTCEG score recompute
  32. 2026-08-11 00:00 UTCEPSS rescore
  33. 2026-08-09 23:11 UTCEG score recompute
  34. 2026-08-09 13:47 UTCEPSS rescore
  35. 2026-08-09 01:26 UTCEG score recompute
  36. 2026-08-08 16:37 UTCEPSS rescore
  37. 2026-08-07 16:49 UTCEG score recompute
  38. 2026-08-06 19:04 UTCEG score recompute
  39. 2026-08-06 13:47 UTCEPSS rescore
  40. 2026-08-05 21:19 UTCEG score recompute
  41. 2026-08-05 19:17 UTCEPSS rescore
  42. 2026-08-05 19:17 UTCEPSS rescore
  43. 2026-08-04 23:34 UTCEG score recompute
  44. 2026-08-04 15:10 UTCEPSS rescore
  45. 2026-08-04 12:41 UTCEG score recompute
  46. 2026-08-04 10:39 UTCEPSS rescore
  47. 2026-08-03 14:35 UTCEG score recompute
  48. 2026-08-03 10:36 UTCEPSS rescore
  49. 2026-08-02 05:55 UTCEG score recompute
  50. 2026-08-02 02:27 UTCEPSS rescore
  51. 2026-08-01 08:11 UTCEG score recompute
  52. 2026-08-01 04:16 UTCEPSS rescore
  53. 2026-07-30 23:32 UTCEG score recompute
  54. 2026-07-30 16:28 UTCEPSS rescore
  55. 2026-07-30 12:39 UTCEG score recompute
  56. 2026-07-30 01:45 UTCEG score recompute
  57. 2026-07-30 01:30 UTCEPSS rescore
  58. 2026-07-28 17:02 UTCEG score recompute
  59. 2026-07-28 15:37 UTCEPSS rescore
  60. 2026-07-27 19:16 UTCEG score recompute▼ 0.10
  61. 2026-07-27 19:15 UTCNVD updateCVSS v3 → 8.8
  62. 2026-07-27 18:28 UTCEG score recompute
  63. 2026-07-27 14:14 UTCEPSS rescore
  64. 2026-07-26 20:43 UTCEG score recompute
  65. 2026-07-26 14:54 UTCEPSS rescore
  66. 2026-07-26 14:54 UTCEPSS rescore
  67. 2026-07-26 09:50 UTCEG score recompute
  68. 2026-07-25 14:18 UTCEPSS rescore
  69. 2026-07-25 14:18 UTCEPSS rescore
  70. 2026-07-24 14:18 UTCEPSS rescore
  71. 2026-07-24 14:18 UTCEPSS rescore
  72. 2026-07-23 14:18 UTCEPSS rescore
  73. 2026-07-23 14:18 UTCEPSS rescore
  74. 2026-07-23 03:22 UTCEG score recompute
  75. 2026-07-22 16:30 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-65591?
CVE-2026-65591 is a high vulnerability published on July 22, 2026. n8n contains a sanitizer bypass vulnerability in the legacy expression evaluator's computed-member handler. An authenticated user with workflow create or modify permissions can craft a malicious expression to bypass the sanitizer and achieve host-level code execution as the n8n process. The legacy…
When was CVE-2026-65591 disclosed?
CVE-2026-65591 was first published in the National Vulnerability Database on July 22, 2026, with the most recent update on July 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-65591 actively exploited?
CVE-2026-65591 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 59.9% of all scored CVEs.
What is the CVSS score of CVE-2026-65591?
CVE-2026-65591 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-65591?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-65591, 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.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-65591

Explore →

Is Your Infrastructure Affected by CVE-2026-65591?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs