{"id":"BIT-mongodb-2026-82052","summary":"$regexFindAll may crash mongod server when byte-matching multi-byte UTF-8 chars","details":"The $regexFindAll expression can be used by an authenticated user who can run aggregation pipeline stages to crash a MongoDB server (mongod). Under certain specific conditions the  regex match can start in the middle of a multi-code-unit character, triggering an assertion during query execution.","aliases":["CVE-2026-82052"],"modified":"2026-09-17T14:45:07.863106354Z","published":"2026-09-17T11:50:37.770Z","database_specific":{"severity":"High","cpes":["cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*"]},"references":[{"type":"ADVISORY","url":"https://jira.mongodb.org/browse/SERVER-127985"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-82052"}],"affected":[{"package":{"name":"mongodb","ecosystem":"Bitnami","purl":"pkg:bitnami/mongodb"},"ranges":[{"type":"SEMVER","events":[{"introduced":"7.0.0"},{"fixed":"7.0.41"},{"introduced":"8.0.0"},{"fixed":"8.0.30"},{"introduced":"8.3.0"},{"fixed":"8.3.9"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/mongodb/BIT-mongodb-2026-82052.json"},"severity":[{"type":"CVSS_V4","score":"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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:X/RE:X/U:X"}]}],"schema_version":"1.9.0"}