CVE-2026-54052

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Source
https://cve.org/CVERecord?id=CVE-2026-54052
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54052.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-54052
Aliases
Published
2026-07-15T20:34:10.748Z
Modified
2026-08-12T03:51:24.398111330Z
Severity
  • 9.9 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L CVSS Calculator
Summary
n8n-MCP: Cross-tenant access to workflow version backups in multi-tenant HTTP deployments
Details

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 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.

Database specific 
{
    "cwe_ids": [
        "CWE-639",
        "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54052.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/czlonkowski/n8n-mcp

Affected ranges

Type
GIT
Repo
https://github.com/czlonkowski/n8n-mcp
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
ed0447d8a0a87ad45436ff5ee1af49a76667c965
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:n8n-mcp:n8n-mcp:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.56.1"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

v2.*
v2.10.1
v2.10.2
v2.10.4
v2.10.5
v2.11.2
v2.11.3
v2.12.0
v2.12.1
v2.12.2
v2.13.0
v2.13.1
v2.13.2
v2.14.0
v2.14.1
v2.14.2
v2.14.3
v2.14.4
v2.14.5
v2.14.6
v2.14.7
v2.15.0
v2.15.1
v2.15.2
v2.15.3
v2.15.4
v2.15.5
v2.15.6
v2.16.0
v2.16.1
v2.16.2
v2.16.3
v2.17.0
v2.17.1
v2.17.2
v2.17.3
v2.17.5
v2.17.6
v2.18.0
v2.18.1
v2.18.10
v2.18.3
v2.18.4
v2.18.5
v2.18.6
v2.18.7
v2.18.8
v2.18.9
v2.19.0
v2.19.1
v2.19.2
v2.19.3
v2.19.4
v2.19.5
v2.19.6
v2.20.0
v2.20.1
v2.20.2
v2.20.3
v2.20.4
v2.20.5
v2.20.6
v2.20.7
v2.20.8
v2.21.0
v2.21.1
v2.22.10
v2.22.11
v2.22.12
v2.22.13
v2.22.14
v2.22.15
v2.22.16
v2.22.17
v2.22.18
v2.22.19
v2.22.20
v2.22.21
v2.22.6
v2.22.7
v2.22.8
v2.22.9
v2.23.0
v2.24.0
v2.24.1
v2.26.0
v2.26.1
v2.26.2
v2.26.3
v2.26.4
v2.26.5
v2.27.0
v2.27.1
v2.27.2
v2.28.0
v2.28.1
v2.28.2
v2.28.3
v2.28.4
v2.28.6
v2.28.7
v2.28.8
v2.28.9
v2.29.0
v2.29.2
v2.29.3
v2.29.4
v2.29.5
v2.30.0
v2.30.1
v2.30.2
v2.31.0
v2.31.1
v2.31.2
v2.31.3
v2.31.4
v2.31.5
v2.31.6
v2.31.7
v2.31.8
v2.31.9
v2.32.0
v2.32.1
v2.33.0
v2.33.1
v2.33.2
v2.33.3
v2.33.4
v2.33.5
v2.33.6
v2.34.0
v2.34.1
v2.34.2
v2.34.3
v2.34.4
v2.34.5
v2.35.0
v2.35.1
v2.35.2
v2.35.3
v2.35.4
v2.35.5
v2.35.6
v2.36.0
v2.36.1
v2.36.2
v2.37.1
v2.37.2
v2.37.3
v2.37.4
v2.38.0
v2.40.0
v2.40.1
v2.40.2
v2.40.3
v2.40.4
v2.40.5
v2.41.0
v2.41.1
v2.41.2
v2.41.3
v2.41.4
v2.42.0
v2.42.1
v2.42.2
v2.42.3
v2.43.0
v2.44.0
v2.44.1
v2.45.0
v2.45.1
v2.46.0
v2.46.1
v2.47.0
v2.47.1
v2.47.10
v2.47.11
v2.47.12
v2.47.13
v2.47.14
v2.47.2
v2.47.3
v2.47.4
v2.47.5
v2.47.6
v2.47.7
v2.47.8
v2.47.9
v2.48.0
v2.48.1
v2.48.2
v2.48.3
v2.49.0
v2.50.0
v2.50.1
v2.50.2
v2.50.3
v2.50.4
v2.50.5
v2.51.0
v2.51.1
v2.51.2
v2.51.3
v2.52.0
v2.53.0
v2.53.1
v2.53.2
v2.54.0
v2.55.0
v2.56.0
v2.7.9
v2.8.1
v2.9.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54052.json"