CVE-2026-54052

CRITICALNVD 9.99.9
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This critical-severity CVE scores 9.9 under NVD CVSS v3. EPSS exploit probability: 0.4% (31st percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
9.9EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 9.9Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.56.1, in HTTP mode with multi-tenancy enabled through ENABLE_MULTI_TENANT=true, n8n-mcp's local workflow version history backups were not isolated per tenant, allowing an authenticated tenant to read workflow version snapshots belonging to other tenants and delete or destroy other tenants' stored backups, including full node definitions, credential references, and authorization headers. This issue is fixed in version 2.56.1.

CVSS v3
9.9
EG Score
9.9CRITICALmedium confidence
EG Risk
45
EG Risk 45/100

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 (value × EchelonGraph’s weight)
Severity99% × 45%
The EG Score, 9.9 of 10.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
31st
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 14, 2026

Last Modified

July 18, 2026

Advisory Details (2)

Auto-updated Oct 10, 2026
Patch available. Sources: github_release, github.
GitHub advisoryMentions a patch (unverified)

Cross-tenant access to workflow version backups in multi-tenant HTTP deployments · Advisory · czlonkowski/n8n-mcp · GitHub

https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-j6r7-6fhx-77wx
GitHub release Patch Available

Release v2.56.1

Patch available: czlonkowski/n8n-mcp v2.56.1

https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.56.1

Vendor Advisories for CVE-2026-54052(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-mcp—
  • every version up to 2.56.1: fixed in 2.56.1
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 36× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 132 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 32 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 11:20 UTCEG score recompute
  2. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  3. 2026-10-13 09:10 UTCEG score recompute
  4. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  5. 2026-10-12 15:57 UTCEG score recompute
  6. 2026-10-11 19:40 UTCEG score recompute
  7. 2026-10-11 16:55 UTCEG score recompute
  8. 2026-10-11 14:18 UTCEG score recompute
  9. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  12. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  14. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  15. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  16. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  17. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  18. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  19. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  20. 2026-10-01 12:53 UTCEG score recompute
  21. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  22. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  23. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  24. 2026-09-28 08:56 UTCEG score recompute
  25. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 30th percentile
Show 75 more
  1. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  2. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  3. 2026-09-24 09:01 UTCEG score recompute
  4. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  5. 2026-09-23 03:32 UTCEG score recompute
  6. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  7. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  8. 2026-09-18 04:52 UTCEG score recompute
  9. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  10. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  11. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  12. 2026-09-13 23:16 UTCEG score recompute
  13. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  14. 2026-09-12 17:09 UTCEG score recompute
  15. 2026-09-11 21:56 UTCEG score recompute
  16. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  17. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  18. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  19. 2026-09-08 01:12 UTCEG score recompute
  20. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  21. 2026-09-06 17:48 UTCEG score recompute
  22. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  23. 2026-09-05 21:01 UTCEG score recompute
  24. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  25. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  26. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  27. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  28. 2026-08-30 20:46 UTCEG score recompute
  29. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  30. 2026-08-30 04:14 UTCEG score recompute
  31. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  32. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  33. 2026-08-27 21:29 UTCEG score recompute
  34. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  35. 2026-08-26 23:22 UTCEG score recompute
  36. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  37. 2026-08-25 15:04 UTCEG score recompute
  38. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  39. 2026-08-24 19:39 UTCEG score recompute
  40. 2026-08-24 12:32 UTCEG score recompute
  41. 2026-08-23 02:40 UTCEG score recompute
  42. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  43. 2026-08-22 03:22 UTCEG score recompute
  44. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  45. 2026-08-20 23:57 UTCEG score recompute
  46. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  47. 2026-08-20 00:28 UTCEG score recompute
  48. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  49. 2026-08-18 20:04 UTCEG score recompute
  50. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  51. 2026-08-17 13:48 UTCEG score recompute
  52. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  53. 2026-08-16 18:23 UTCEG score recompute
  54. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  55. 2026-08-16 02:54 UTCEG score recompute
  56. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  57. 2026-08-15 03:42 UTCEG score recompute
  58. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  59. 2026-08-14 00:37 UTCEG score recompute
  60. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  61. 2026-08-12 17:34 UTCEG score recompute
  62. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  63. 2026-08-11 14:17 UTCEG score recompute
  64. 2026-08-11 02:41 UTCEG score recompute
  65. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  66. 2026-08-09 15:50 UTCEG score recompute
  67. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  68. 2026-08-08 16:38 UTCEG score recompute
  69. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  70. 2026-08-07 17:25 UTCEG score recompute
  71. 2026-08-06 14:20 UTCEG score recompute
  72. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  73. 2026-08-05 22:52 UTCEG score recompute
  74. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  75. 2026-08-04 17:02 UTCEG score recompute

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-54052?
CVE-2026-54052 is a critical-severity vulnerability; its CVE record was published on July 14, 2026. n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.56.1, in HTTP mode with multi-tenancy enabled through ENABLEMULTITENANT=true, n8n-mcp's local workflow version history backups were not isolated per tenant, allowing an…
When was the CVE record for CVE-2026-54052 published?
The CVE record for CVE-2026-54052 was published on July 14, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 18, 2026; the record at its source may have been updated since.
Is CVE-2026-54052 actively exploited?
CVE-2026-54052 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (31st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-54052?
CVE-2026-54052 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2026-54052?
A fix for CVE-2026-54052 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-54052 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-54052

Explore →

Is Your Infrastructure Affected by CVE-2026-54052?

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

Book a Demo →Browse All CVEs