{"id":"CVE-2026-18697","aliases":["BIT-mongodb-2026-18697","EUVD-2026-56910","GHSA-wxp5-7rcf-9m3q","UBUNTU-CVE-2026-18697"],"status":"published","title":"Improper Input Validation in MongoDB Aggregation Framework Allows Unauthenticated Denial of Service on mongos","description":"An issue in MongoDB Server's aggregation framework could allow an unauthenticated party to cause a mongos (router) process to terminate unexpectedly by submitting a specially formed aggregation command. 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This could result in a denial of service, disrupting client connections routed through the affected mongos instance.","status":"published","published":"2026-08-11T18:39:03.905Z","modified":"2026-10-28T11:07:52.965557594Z","cvss":[{"version":"4.0","score":8.7,"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","level":"high"}],"cwes":["CWE-617"],"updated_at":"2026-11-02T15:44:58.024074Z"},{"id":"UBUNTU-CVE-2026-18697","description":"An issue in MongoDB Server's aggregation framework could allow an unauthenticated party to cause a mongos (router) process to terminate unexpectedly by submitting a specially formed aggregation command. This could result in a denial of service, disrupting client connections routed through the affected mongos instance.","status":"published","published":"2026-08-11T19:17:00Z","modified":"2026-08-19T13:31:17.764034406Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"},{"version":"4.0","score":8.7,"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","level":"high"}],"updated_at":"2026-11-02T16:56:01.334185Z"},{"id":"BIT-mongodb-2026-18697","title":"Improper Input Validation in MongoDB Aggregation Framework Allows Unauthenticated Denial of Service on mongos","description":"An issue in MongoDB Server's aggregation framework could allow an unauthenticated party to cause a mongos (router) process to terminate unexpectedly by submitting a specially formed aggregation command. This could result in a denial of service, disrupting client connections routed through the affected mongos instance.","status":"published","published":"2026-09-17T11:49:59.032Z","modified":"2026-10-01T10:00:08.879910902Z","updated_at":"2026-11-02T15:28:33.469426Z"}]}}