CVE-2026-56776

HIGHPre-NVD 7.47.4—
EchelonGraph scoreMEDIUM confidence

Score 7.4 from GitHub Security Advisory published 2026-07-08. A secondary CVSS source baseline 7.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
7.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

n8n before 1.123.55, 2.25.7, and 2.26.2 contains an authorization bypass in the POST /workflows/{workflowId}/test-runs/new endpoint, which authorizes access using the workflow:read scope instead of workflow:execute. An authenticated user with read-only access to a workflow can trigger a real evaluation test run, causing the workflow to execute via the internal workflow runner and resulting in unintended outbound API calls, data mutations, or other side effects in connected downstream systems. The issue primarily affects instances using the Evaluations feature where RBAC project roles grant workflow:read without workflow:execute.

CVSS v3
7.4
EG Score
7.4HIGHmedium confidence
EG Risk
33
EG Risk 33/100CISA 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
Severity74% × 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
0.3%
EPSS %ILE
18th
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

July 8, 2026

Last Modified

July 9, 2026

Advisory Details (2)

Auto-updated Jul 8, 2026
Patch available. Sources: github.
generic

n8n - Incorrect OAuth Scope Validation in Workflow Test Run Endpoint | Advisories | VulnCheck

https://www.vulncheck.com/advisories/n8n-incorrect-oauth-scope-validation-in-workflow-test-run-endpoint
githubMentions a patch (unverified)

Wrong OAuth Scope On Evaluations Test Run Creation Endpoint · Advisory · n8n-io/n8n · GitHub

https://github.com/n8n-io/n8n/security/advisories/GHSA-hv7x-3x78-gx53

Vendor Advisories for CVE-2026-56776(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 rangeFix by version rangeDependents
n8n—
  • every version up to 1.123.55: fixed in 1.123.55
  • 2.26.0 up to 2.26.2: fixed in 2.26.2
  • 2.0.0-rc.0 up to 2.25.7: fixed in 2.25.7
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 43× 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 233 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-56776?
CVE-2026-56776 is a high vulnerability published on July 8, 2026. n8n before 1.123.55, 2.25.7, and 2.26.2 contains an authorization bypass in the POST /workflows/{workflowId}/test-runs/new endpoint, which authorizes access using the workflow:read scope instead of workflow:execute. An authenticated user with read-only access to a workflow can trigger a real…
When was CVE-2026-56776 disclosed?
CVE-2026-56776 was first published on July 8, 2026, with the most recent update on July 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56776 actively exploited?
CVE-2026-56776 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (18th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-56776?
CVE-2026-56776 has a CVSS base score of 7.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-56776?
A fix for CVE-2026-56776 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-56776 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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