{"answers":{"affected":"4 open source packages ship an affected version, including n8n. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-86075 in the wild and no public exploit code.","fix":"Upgrade n8n to a fixed version for your release line: 2.37.7 or 2.38.2.","what":"CVE-2026-86075 is a high-severity denial of service vulnerability in N8n N8n, published on 8 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-86075 and fix it if it is affected.\n\nWhat it is: CVE-2026-86075 is a high-severity denial of service vulnerability in N8n N8n, published on 8 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-86075 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- n8n (npm): affected all versions; fixed in 2.37.7\n- n8n (npm): affected all versions; fixed in 2.37.7\n- n8n (npm): affected from 2.38.0; fixed in 2.38.2\n- n8n (npm): affected from 2.38.0; fixed in 2.38.2\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-2026-86075/ (Markdown: https://insights.sbomify.com/CVE-2026-86075/index.md)","id":"CVE-2026-86075","markdown":"https://insights.sbomify.com/CVE-2026-86075/index.md","name":"CVE-2026-86075","record":{"aliases":["GHSA-hh89-3r9w-qj3j","MINI-8hg7-cqv7-353c","ROOT-APP-NPM-CVE-2026-86075"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"workflow automation platform","requires_auth":"none","summary":"Unauthenticated attackers can exhaust database storage by sending oversized values to the OAuth Dynamic Client Registration endpoint in n8n.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"n8n","vendor":"n8n"}],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"n8n is an open source workflow automation platform. Prior to 2.37.7 and 2.38.2, the OAuth Dynamic Client Registration endpoint bounded redirect_uris but accepted arbitrarily large client_name and grant_types values. An unauthenticated remote caller could repeatedly persist oversized values in oauth_clients and exhaust database storage. The affected validation is in packages/cli/src/modules/oauth-server/oauth-server.service.ts, including MAX_CLIENT_NAME_LENGTH and MAX_GRANT_TYPES. This issue is fixed in versions 2.37.7 and 2.38.2.","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: Unauthenticated Persistent Storage Exhaustion via OAuth Dynamic Client Registration Endpoint","id":"CVE-2026-86075","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":"n8n:n8n","products":["n8n:n8n"],"type":"denial_of_service","year":"2026"},"n_packages":4,"n_references":3,"next":{"headline":"n8n: Expression Sandbox Escape in Editor-UI Enables Stored Cross-User JavaScript Execution","id":"CVE-2026-86076"},"packages":[{"ecosystem":"npm","fixed":["2.37.7"],"introduced":["0"],"last_affected":[],"package":"n8n","purl":null,"source":"GHSA-hh89-3r9w-qj3j"},{"ecosystem":"npm","fixed":["2.37.7"],"introduced":["0"],"last_affected":[],"package":"n8n","purl":"pkg:npm/n8n","source":"GHSA-hh89-3r9w-qj3j"},{"ecosystem":"npm","fixed":["2.38.2"],"introduced":["2.38.0"],"last_affected":[],"package":"n8n","purl":null,"source":"GHSA-hh89-3r9w-qj3j"},{"ecosystem":"npm","fixed":["2.38.2"],"introduced":["2.38.0"],"last_affected":[],"package":"n8n","purl":"pkg:npm/n8n","source":"GHSA-hh89-3r9w-qj3j"}],"prev":{"headline":"n8n: Instance AI Credential Setup Accepts Unvalidated Probe URL from Fetched Content","id":"CVE-2026-86074"},"products":["n8n"],"published":"2026-09-08","related":[{"cvss_score":10,"headline":"n8n Improper Control of Dynamically-Managed Code Resources","id":"CVE-2025-68613","kev_date_added":"2026-03-11","published":"2025-12-19"},{"cvss_score":10,"headline":"n8n is vulnerable to Remote Code Execution via Arbitrary File Write","id":"CVE-2026-21877","kev_date_added":null,"published":"2026-01-08"},{"cvss_score":10,"headline":"n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling","id":"CVE-2026-21858","kev_date_added":null,"published":"2026-01-07"},{"cvss_score":9.9,"headline":"n8n Unsafe Workflow Expression Evaluation Allows Remote Code Execution","id":"CVE-2026-1470","kev_date_added":null,"published":"2026-01-27"},{"cvss_score":9.9,"headline":"n8n Vulnerable to Arbitrary Command Execution in Pyodide based Python Code Node","id":"CVE-2025-68668","kev_date_added":null,"published":"2025-12-26"},{"cvss_score":9.5,"headline":"n8n has Unauthenticated Expression Evaluation via Form Node","id":"CVE-2026-27493","kev_date_added":null,"published":"2026-02-25"},{"cvss_score":9.4,"headline":"n8n: HTTP Request Node Pagination Prototype Pollution to RCE","id":"CVE-2026-44789","kev_date_added":null,"published":"2026-06-23"}],"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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-09","vendors":["n8n-io"]},"summary":"Unauthenticated attackers can exhaust database storage by sending oversized values to the OAuth Dynamic Client Registration endpoint in n8n.","url":"https://insights.sbomify.com/CVE-2026-86075/"}