{"answers":{"affected":"2 open source packages ship an affected version, including n8n-mcp. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-54052 in the wild and no public exploit code.","fix":"Upgrade n8n-mcp to 2.56.1 or later.","what":"CVE-2026-54052 is a critical missing authorization vulnerability in czlonkowski n8n-mcp, published on 15 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-54052 and fix it if it is affected.\n\nWhat it is: CVE-2026-54052 is a critical missing authorization vulnerability in czlonkowski n8n-mcp, published on 15 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-54052 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- n8n-mcp (npm): affected all versions; fixed in 2.56.1\n- n8n-mcp (npm): affected all versions; fixed in 2.56.1\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-54052/ (Markdown: https://insights.sbomify.com/CVE-2026-54052/index.md)","id":"CVE-2026-54052","markdown":"https://insights.sbomify.com/CVE-2026-54052/index.md","name":"CVE-2026-54052","record":{"aliases":["GHSA-j6r7-6fhx-77wx"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read","data_modify"],"network_reachable":"yes","non_default_config":true,"product_category":"n8n MCP server","requires_auth":"low_privilege","summary":"Authenticated tenants can read and delete other tenants' workflow backups in multi-tenant HTTP deployments due to missing isolation.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"n8n-mcp","vendor":"n8n-mcp"}],"cvss":{"score":9.9,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L","version":"3.1"},"cwes":[{"id":"CWE-862","name":"Missing Authorization"},{"id":"CWE-639","name":"Authorization Bypass Through User-Controlled Key"}],"description":"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.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"n8n-MCP: Cross-tenant access to workflow version backups in multi-tenant HTTP deployments","id":"CVE-2026-54052","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"missing_authorization","year":"2026"},"n_packages":2,"n_references":2,"next":{"headline":"Many Notes: Path Traversal via ZIP import allows arbitrary file write and stored XSS in other users' vaults","id":"CVE-2026-54053"},"packages":[{"ecosystem":"npm","fixed":["2.56.1"],"introduced":["0"],"last_affected":[],"package":"n8n-mcp","purl":null,"source":"GHSA-j6r7-6fhx-77wx"},{"ecosystem":"npm","fixed":["2.56.1"],"introduced":["0"],"last_affected":[],"package":"n8n-mcp","purl":"pkg:npm/n8n-mcp","source":"GHSA-j6r7-6fhx-77wx"}],"prev":{"headline":"Network-AI has an an OS Command Injection issue","id":"CVE-2026-54051"},"products":["n8n-mcp"],"published":"2026-07-15","related":[{"cvss_score":8.5,"headline":"n8n-MCP: IPv4-mapped IPv6 addresses bypass SSRF protection in validateUrlSync(), enabling full SSRF for SDK embedders","id":"CVE-2026-42449","kev_date_added":null,"published":"2026-05-07"},{"cvss_score":8.5,"headline":"n8n-MCP has an Authenticated SSRF via instance-URL header in multi-tenant HTTP mode","id":"CVE-2026-39974","kev_date_added":null,"published":"2026-04-09"},{"cvss_score":8.1,"headline":"n8n-MCP: Multi-tenant MCP requests fall back to process-level n8n credentials when tenant headers are absent or incomplete","id":"CVE-2026-45707","kev_date_added":null,"published":"2026-05-29"},{"cvss_score":7.2,"headline":"n8n-MCP: Authenticated SSRF in n8n-mcp webhook and API client paths","id":"CVE-2026-44694","kev_date_added":null,"published":"2026-05-08"},{"cvss_score":6.5,"headline":"n8n-MCP: Workflow telemetry sanitizer could retain partial values from URL-shaped node parameters","id":"CVE-2026-45582","kev_date_added":null,"published":"2026-05-29"},{"cvss_score":5.3,"headline":"n8n-MCP Logs Sensitive Request Data on Unauthorized /mcp Requests","id":"CVE-2026-41495","kev_date_added":null,"published":"2026-05-08"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-07-18","vendors":["czlonkowski"]},"summary":"Authenticated tenants can read and delete other tenants' workflow backups in multi-tenant HTTP deployments due to missing isolation.","url":"https://insights.sbomify.com/CVE-2026-54052/"}