CVE-2026-65594

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 81% 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
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

n8n before 2.29.8 and 2.30.x before 2.30.1 (affected from 2.27.0, when the OAuth 2.1 consent and token-issuance flow was introduced) does not verify that the authenticated user has access to the workflow referenced as the OAuth resource. On instances with at least one active MCP Server Trigger workflow configured with n8n OAuth2 authentication, a member-level user can register an OAuth client, self-approve consent for another user's workflow, and obtain a valid token. The workflow then runs in the owner's project context with the owner's stored credentials, and the attacker can set tool inputs and read outputs (potentially including data from the owner's connected integrations), breaking user and project isolation.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
19%
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 2.30.1 Missing OAuth Authorization Check | Advisories | VulnCheck

https://www.vulncheck.com/advisories/n8n-before-missing-oauth-authorization-check
github Patch Available

Member-Level Users Can Execute Other Users' MCP Server Trigger Workflows via Missing OAuth Authorization Check · Advisory · n8n-io/n8n · GitHub

https://github.com/n8n-io/n8n/security/advisories/GHSA-q5xf-xhwf-cwqf

Vendor Advisories for CVE-2026-65594(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 / 42× 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 16:57 UTCEG score recompute
  2. 2026-09-12 17:12 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 17:30 UTCEG score recompute
  12. 2026-09-06 13:47 UTCEPSS rescore
  13. 2026-09-05 19:35 UTCEG score recompute
  14. 2026-09-05 15:31 UTCEPSS rescore
  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 22:36 UTCEG score recompute
  22. 2026-08-30 19:17 UTCEPSS rescore
  23. 2026-08-30 01:22 UTCEPSS rescore
  24. 2026-08-30 00:57 UTCEG score recompute
  25. 2026-08-28 21:42 UTCEPSS rescore
Show 75 more
  1. 2026-08-27 11:20 UTCEG score recompute
  2. 2026-08-26 14:47 UTCEPSS rescore
  3. 2026-08-25 15:57 UTCEG score recompute
  4. 2026-08-25 13:49 UTCEPSS rescore
  5. 2026-08-24 18:19 UTCEG score recompute
  6. 2026-08-23 20:40 UTCEG score recompute
  7. 2026-08-23 00:19 UTCEPSS rescore
  8. 2026-08-22 01:22 UTCEG score recompute
  9. 2026-08-21 23:49 UTCEPSS rescore
  10. 2026-08-21 03:43 UTCEG score recompute
  11. 2026-08-20 22:56 UTCEPSS rescore
  12. 2026-08-20 06:05 UTCEG score recompute
  13. 2026-08-19 17:04 UTCEPSS rescore
  14. 2026-08-19 08:26 UTCEG score recompute
  15. 2026-08-18 13:48 UTCEPSS rescore
  16. 2026-08-18 10:48 UTCEG score recompute
  17. 2026-08-17 13:47 UTCEPSS rescore
  18. 2026-08-16 15:30 UTCEG score recompute
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-15 17:52 UTCEG score recompute
  21. 2026-08-15 01:30 UTCEPSS rescore
  22. 2026-08-13 22:34 UTCEG score recompute
  23. 2026-08-13 22:00 UTCEPSS rescore
  24. 2026-08-13 00:55 UTCEG score recompute
  25. 2026-08-12 13:51 UTCEPSS rescore
  26. 2026-08-12 03:17 UTCEG score recompute
  27. 2026-08-11 05:38 UTCEG score recompute
  28. 2026-08-11 00:00 UTCEPSS rescore
  29. 2026-08-10 08:00 UTCEG score recompute
  30. 2026-08-09 13:47 UTCEPSS rescore
  31. 2026-08-09 10:21 UTCEG score recompute
  32. 2026-08-08 16:37 UTCEPSS rescore
  33. 2026-08-08 12:43 UTCEG score recompute
  34. 2026-08-06 17:26 UTCEG score recompute
  35. 2026-08-06 13:47 UTCEPSS rescore
  36. 2026-08-05 19:47 UTCEG score recompute
  37. 2026-08-05 19:17 UTCEPSS rescore
  38. 2026-08-05 19:17 UTCEPSS rescore
  39. 2026-08-04 22:09 UTCEG score recompute
  40. 2026-08-04 15:10 UTCEPSS rescore
  41. 2026-08-04 10:39 UTCEPSS rescore
  42. 2026-08-04 00:30 UTCEG score recompute
  43. 2026-08-03 10:36 UTCEPSS rescore
  44. 2026-08-01 07:35 UTCEG score recompute
  45. 2026-08-01 04:16 UTCEPSS rescore
  46. 2026-07-31 09:56 UTCEG score recompute
  47. 2026-07-30 16:28 UTCEPSS rescore
  48. 2026-07-30 12:16 UTCEG score recompute
  49. 2026-07-30 01:30 UTCEPSS rescore
  50. 2026-07-28 16:58 UTCEG score recompute
  51. 2026-07-28 15:37 UTCEPSS rescore
  52. 2026-07-27 19:17 UTCEG score recompute▲ 1.40
  53. 2026-07-27 19:15 UTCNVD updateCVSS v3 → 6.5
  54. 2026-07-27 14:14 UTCEPSS rescore
  55. 2026-07-27 01:09 UTCEG score recompute
  56. 2026-07-26 14:54 UTCEPSS rescore
  57. 2026-07-26 14:54 UTCEPSS rescore
  58. 2026-07-26 03:30 UTCEG score recompute
  59. 2026-07-25 14:18 UTCEPSS rescore
  60. 2026-07-25 14:18 UTCEPSS rescore
  61. 2026-07-24 14:18 UTCEPSS rescore
  62. 2026-07-24 14:18 UTCEPSS rescore
  63. 2026-07-23 14:18 UTCEPSS rescore
  64. 2026-07-23 14:18 UTCEPSS rescore
  65. 2026-07-23 03:22 UTCEG score recompute
  66. 2026-07-22 22:07 UTCEG score recompute
  67. 2026-07-22 22:07 UTCGHSA enrichment
  68. 2026-07-22 19:59 UTCGHSA enrichment
  69. 2026-07-22 19:52 UTCGHSA enrichment
  70. 2026-07-22 19:42 UTCGHSA enrichment
  71. 2026-07-22 19:40 UTCGHSA enrichment
  72. 2026-07-22 19:39 UTCGHSA enrichment
  73. 2026-07-22 19:32 UTCGHSA enrichment
  74. 2026-07-22 19:29 UTCGHSA enrichment
  75. 2026-07-22 19:26 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-65594?
CVE-2026-65594 is a medium vulnerability published on July 22, 2026. n8n before 2.29.8 and 2.30.x before 2.30.1 (affected from 2.27.0, when the OAuth 2.1 consent and token-issuance flow was introduced) does not verify that the authenticated user has access to the workflow referenced as the OAuth resource. On instances with at least one active MCP Server Trigger…
When was CVE-2026-65594 disclosed?
CVE-2026-65594 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-2026-65594 actively exploited?
CVE-2026-65594 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 81.1% of all scored CVEs.
What is the CVSS score of CVE-2026-65594?
CVE-2026-65594 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-65594?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-65594, 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-2026-65594

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