CVE-2026-55608

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Source
https://cve.org/CVERecord?id=CVE-2026-55608
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55608.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55608
Aliases
Published
2026-07-15T20:35:29Z
Modified
2026-10-28T02:30:49Z
Severity
  • 4.2 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
Summary
n8n-MCP: Incorrect authorization can expose default-scope workflow version backups in multi-tenant HTTP mode
Details

n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.57.4, multi-tenant HTTP mode with ENABLE_MULTI_TENANT=true could allow an authenticated tenant to access default-scope workflow_versions backups instead of being confined to the tenant scope, exposing or deleting workflow-version backups from prior single-tenant deployments or migrations. This issue is fixed in version 2.57.4.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-200",
        "CWE-863"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55608.json"
}
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
1f42899749ed0c584fb6b4fd63d75233c3edee59
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "2.57.4"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "1f42899749ed0c584fb6b4fd63d75233c3edee59"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "v2.57.4",
            "range":  [
                {
                    "fixed":  "1f42899749ed0c584fb6b4fd63d75233c3edee59"
                }
            ],
            "source":  "REFERENCES_TAG"
        },
        {
            "cpe":  "cpe:2.3:a:n8n-mcp:n8n-mcp:*:*:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "2.57.4"
                }
            ],
            "source":  "CPE_RANGE"
        }
    ]
}

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
v2.56.1
v2.57.0
v2.57.1
v2.57.2
v2.57.3
v2.7.9
v2.8.1
v2.9.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55608.json"