{"id":"CVE-2026-106434","revision":"e96f20c31a9640faaeed03c380fdc69b","records":[{"revision":"e96f20c31a9640faaeed03c380fdc69b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-106434","aliases":[],"title":"Unrecognized payload acceptance in explicit decryption in MongoDB libmongocrypt","description":"The explicit decryption component of MongoDB libmongocrypt can return an unrecognized encrypted payload unchanged instead of returning a decryption error. An actor who can modify stored encrypted fields, such as a database writer, server, or network intermediary, can cause an affected application to process the supplied bytes as decrypted plaintext.","state":0,"publishedAt":"2026-10-08T18:56:43.244+00:00","modifiedAt":"2026-10-08T19:30:49.513+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\": \"1.5.0\",\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:N/VI:L/VA:N/SC:N/SI:N/SA:N","score":5.3,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","score":4.3,"severity":"MEDIUM"}],"references":["https://jira.mongodb.org/browse/MONGOCRYPT-966"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-106434","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-106434","identifiers":["CVE-2026-106434"]},"retained":false,"historicalAffected":[]}],"coverage":[]}