{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-103256 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-103256 is a high-severity vulnerability in n8n-io n8n, published on 1 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-103256 and fix it if it is affected.\n\nWhat it is: CVE-2026-103256 is a high-severity vulnerability in n8n-io n8n, published on 1 Oct 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-2026-103256 in the wild and no public exploit code.\n\nAffected product: n8n-io n8n. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-103256/ (Markdown: https://insights.sbomify.com/CVE-2026-103256/index.md)","id":"CVE-2026-103256","markdown":"https://insights.sbomify.com/CVE-2026-103256/index.md","name":"CVE-2026-103256","record":{"aliases":["GHSA-6m32-557f-fqq9","GHSA-gx6g-2hm7-c4xf","MINI-j4g7-f48p-h6p9"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"n8n workflow automation","requires_auth":"low_privilege","summary":"Attackers with credential update permissions can leak unencrypted passwords to arbitrary hosts by bypassing domain validation in n8n.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":7.1,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:L/SA:N","version":"4.0"},"cwes":[{"id":"CWE-522","name":"Insufficiently Protected Credentials"}],"description":"n8n versions before 2.39.6 and 2.40.0 before 2.40.1 contain a credentials leak vulnerability in the Wekan and Baserow username-and-password credentials that sends unencrypted passwords to unvalidated hosts. Attackers with credential update permissions can modify the host field to receive account passwords at arbitrary hosts, bypassing domain validation controls.","ecosystems":[],"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 before 2.39.6 and 2.40.x before 2.40.1 Credentials Leak via preAuthentication Hook","id":"CVE-2026-103256","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"information_disclosure","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"n8n before 1.123.80, 2.39.6, and 2.40.1 Path Traversal via n8n Node","id":"CVE-2026-103257"},"packages":[],"prev":{"headline":"n8n before 1.123.80, 2.39.6, and 2.40.1 Path Traversal and Query Injection via Supabase","id":"CVE-2026-103255"},"products":["n8n"],"published":"2026-10-01","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"partial"},"state":"PUBLISHED","updated":"2026-10-01","vendors":["n8n-io"]},"summary":"Attackers with credential update permissions can leak unencrypted passwords to arbitrary hosts by bypassing domain validation in n8n.","url":"https://insights.sbomify.com/CVE-2026-103256/"}