{"id":"CVE-2026-104005","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-104005","generatedAt":"2026-10-28T01:11:49.718Z","title":"A security issue was discovered in MongoDB mongos (the sharded cluster router) where an authenticated user with readWrite privileges could crash the mongos process by crafting a specially formed aggregation pipeline.","description":"A security issue was discovered in MongoDB mongos (the sharded cluster router) where an authenticated user with readWrite privileges could crash the mongos process by crafting a specially formed aggregation pipeline. The issue leverages an internal aggregation stage that lacks proper authorization checks despite being intended for internal use, allowing a subsequent stage to be forced to execute on the router under conditions it was not designed to handle. This results in an unhandled fatal error that causes the mongos process to immediately abort, resulting in denial of service for all clients routed through the affected mongos instance.","published":"2026-10-13T16:17:11.000Z","lastModified":"2026-10-15T20:38:04.000Z","status":"Awaiting Analysis","sourceIdentifier":"cna@mongodb.com","cvss":{"version":"4.0","score":7.1,"severity":"HIGH","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-617"],"affected":[],"epss":{"score":0.00235,"percentile":0.14307,"date":"2026-10-26","history":[{"date":"2026-10-14","score":0.00235,"percentile":0.13326}]},"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 (0.24%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-10-13T19:00:10.000Z","detail":{"from":"5.3","score":"7.1","severity":"HIGH","fromSeverity":"MEDIUM"},"summary":"Now scored CVSS 7.1 HIGH (was 5.3)."},{"kind":"new","label":"New CVE","at":"2026-10-13T16:17:11.000Z","detail":{"score":"5.3","severity":"MEDIUM","publishedAt":"2026-10-13T16:17:11.137Z"},"summary":"New CVE, high severity (CVSS 7.1)."}],"references":[{"url":"https://jira.mongodb.org/browse/SERVER-131411","source":"cna@mongodb.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-104005","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."}