{"id":"CVE-2026-103250","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-103250","generatedAt":"2026-10-28T01:01:01.042Z","title":"n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before 2.40.1 contain a NoSQL injection vulnerability in the MongoDB Chat Memory node that fails to validate the sessionId parameter.","description":"n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before 2.40.1 contain a NoSQL injection vulnerability in the MongoDB Chat Memory node that fails to validate the sessionId parameter. Unauthenticated attackers can supply MongoDB query operators in the sessionId field to access conversation histories from other users and perform unauthorized write and delete operations.","published":"2026-10-01T11:17:19.000Z","lastModified":"2026-10-06T01:16:32.000Z","status":"Deferred","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":7,"severity":"HIGH","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-943"],"affected":[],"epss":{"score":0.00201,"percentile":0.09848,"date":"2026-10-26","history":[{"date":"2026-10-02","score":0.00201,"percentile":0.0898}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.20%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-01T11:17:19.000Z","detail":{"score":"7.0","severity":"HIGH","publishedAt":"2026-10-01T11:17:18.777Z"},"summary":"New CVE, high severity (CVSS 7.0)."}],"references":[{"url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-w24g-6454-7w7f","source":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/n8n-before-1.123.80-2.39.6-and-2.40.1-nosql-injection-via-mongodb-chat-memory","source":"disclosure@vulncheck.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-103250","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}