{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-103259 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-103259 is a high-severity vulnerability in n8n-io n8n, published on 1 Oct 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-103259 and fix it if it is affected.\n\nWhat it is: CVE-2026-103259 is a high-severity vulnerability in n8n-io n8n, published on 1 Oct 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-103259 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-2026-103259/ (Markdown: https://insights.sbomify.com/CVE-2026-103259/index.md)","id":"CVE-2026-103259","markdown":"https://insights.sbomify.com/CVE-2026-103259/index.md","name":"CVE-2026-103259","record":{"aliases":["GHSA-qrhv-fqjc-jcmq","GHSA-rx55-8qhx-4hwx","MINI-ppcv-ppc7-5r33"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_read","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"n8n workflow automation","requires_auth":"high_privilege","summary":"Attackers can steal session tokens from collaborators via malicious resolver registration, leading to unauthorized credential access in n8n.","user_interaction":"required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":8.5,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:A/VC:H/VI:H/VA:H/SC:H/SI:L/SA:N","version":"4.0"},"cwes":[{"id":"CWE-863","name":"Incorrect Authorization"}],"description":"n8n versions before 2.39.6 and 2.40.0 before 2.40.1 contain a session token leakage vulnerability in the Dynamic Credentials authorize and revoke endpoints. Attackers with resolver registration capability can capture collaborators' session tokens by setting a fallback resolver to an attacker-controlled endpoint during the account connection flow, enabling unauthorized credential access.","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 Session Token Leak via Dynamic Credentials","id":"CVE-2026-103259","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 2.39.6 and 2.40.x before 2.40.1 Approval Bypass via Send and Wait Node","id":"CVE-2026-103260"},"packages":[],"prev":{"headline":"n8n before 2.39.6 and 2.40.x before 2.40.1 Filter Bypass via Parameter Interpolation","id":"CVE-2026-103258"},"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":"total"},"state":"PUBLISHED","updated":"2026-10-01","vendors":["n8n-io"]},"summary":"Attackers can steal session tokens from collaborators via malicious resolver registration, leading to unauthorized credential access in n8n.","url":"https://insights.sbomify.com/CVE-2026-103259/"}