{"id":"CVE-2026-106433","summary":"Heap corruption via duplicate masterKey fields in MongoDB libmongocrypt","details":"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.","modified":"2026-10-29T02:48:34.645762752Z","published":"2026-10-08T18:55:34.174Z","database_specific":{"unresolved_ranges":[{"extracted_events":[{"strategy":"StandardRange","range":[{"introduced":"1.1.0"},{"fixed":"1.20.5"}],"source":"AFFECTED_FIELD"}]}],"cna_assigner":"mongodb","cwe_ids":["CWE-843"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106433.json"},"references":[{"type":"WEB","url":"https://jira.mongodb.org/browse/MONGOCRYPT-964"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106433.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106433"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mongodb/libmongocrypt","events":[{"introduced":"86d80e2b8d79d432fc0befc38d1bbdb73a4d7795"},{"fixed":"f2158c3304df5ecdd7853e74b6c96a7bba96a11f"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"1.5.0"},{"fixed":"1.20.5"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:mongodb:libmongocrypt:*:*:*:*:*:*:*:*"}]}}],"versions":["1.20.4","1.20.3","1.20.2","1.20.1","1.20.0","pymongocrypt-1.18.1","pymongocrypt-1.18.0","pymongocrypt-1.18.0.dev0","pymongocrypt-1.17.0","pymongocrypt-1.16.0","pymongocrypt-1.15.1","pymongocrypt-1.15.0","pymongocrypt-1.14.1","pymongocrypt-1.14.0","pymongocrypt-1.13.0","pymongocrypt-1.12.2","pymongocrypt-1.12.2rc4","pymongocrypt-1.12.2rc2","pymongocrypt-1.12.2rc1","pymongocrypt-1.2.2rc0","pymongocrypt-1.12.1","pymongocrypt-1.12.0","pymongocrypt-1.11.0","java-1.11.0","csharp-v1.11.0","pymongocrypt-1.10.1","csharp-v1.10.0","pymongocrypt-1.10.0","1.10.0b1","1.10.0b0","pymongocrypt-1.9.1","node-v6.0.1","csharp-v1.9.0","pymongocrypt-1.9.0","csharp-v1.8.2","csharp-v1.8.1","pymongocrypt-1.8.0","node-v2.9.0","node-v6.0.0","node-v6.0.0-alpha.3","node-v6.0.0-alpha.2","pymongocrypt-1.7.0","pymongocrypt-1.6.1","csharp-v1.8.0","node-v2.8.0","pymongocrypt-1.6.0","1.8.0-alpha1","pymongocrypt-1.5.2","csharp-v1.8.0-alpha.0","java-1.8.0-alpha0","node-v2.8.0-alpha.0","1.8.0-alpha0","node-v2.7.1","node-v2.7.0","node-v2.7.0-alpha.0","node-v2.6.0","node-v2.6.0-alpha.0","pymongocrypt-1.5.1","node-v2.5.0","node-v2.4.0","pymongocrypt-1.5.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-106433.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"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"}]}