{"id":"BIT-mongodb-2026-18687","summary":"Improper Validation in MongoDB Queryable Encryption Maintenance Operation Leads to Denial of Service and Index Corruption","details":"MongoDB Server's handling of a Queryable Encryption maintenance operation did not properly validate certain request parameters against the collection's encrypted field configuration before use. An authenticated user with readWrite privileges could submit a specially formed request that leads to a server crash or excessive internal writes, resulting in resource exhaustion and corruption of encrypted index data.","aliases":["CVE-2026-18687"],"modified":"2026-09-17T14:45:09.408624827Z","published":"2026-09-17T11:49:46.203Z","database_specific":{"severity":"High","cpes":["cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*","cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:-:*:*"]},"references":[{"type":"ADVISORY","url":"https://jira.mongodb.org/browse/SERVER-130628"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-18687"}],"affected":[{"package":{"name":"mongodb","ecosystem":"Bitnami","purl":"pkg:bitnami/mongodb"},"ranges":[{"type":"SEMVER","events":[{"introduced":"8.0.0"},{"fixed":"8.0.29"},{"introduced":"8.2.0"},{"fixed":"8.3.8"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/mongodb/BIT-mongodb-2026-18687.json"},"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}],"schema_version":"1.9.0"}