{"id":"CVE-2026-106433","revision":"dbf8470f67f840278173796b810c886a","records":[{"revision":"dbf8470f67f840278173796b810c886a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-106433","aliases":[],"title":"Heap corruption via duplicate masterKey fields in MongoDB libmongocrypt","description":"Improper state management in MongoDB libmongocrypt can cause provider-specific data to be treated as an incompatible type when cleaning up a key document containing duplicate masterKey fields. An authenticated actor who can modify key vault documents, or a server that returns such a key document, can cause invalid memory access and invalid frees in the client process. This can terminate the application or corrupt process memory.","state":0,"publishedAt":"2026-10-08T18:55:34.174+00:00","modifiedAt":"2026-10-08T19:30:26.703+00:00","affected":[{"ecosystem":"Vendor product","name":"libmongocrypt","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"MongoDB\",\n                    \"product\": \"libmongocrypt\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"1.1.0\",\n                            \"lessThan\": \"1.20.5\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":8.7,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8,"severity":"HIGH"}],"references":["https://jira.mongodb.org/browse/MONGOCRYPT-964"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-106433","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-106433","identifiers":["CVE-2026-106433"]},"retained":false,"historicalAffected":[]}],"coverage":[]}