{"id":"CVE-2026-106434","title":"The explicit decryption component of MongoDB libmongocrypt can return an unrecognized encrypted payload unchanged instead of returning a decryption error","summary":"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…","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","cwe":["CWE-354"],"published":"2026-10-08","updated":"2026-10-08","sourceUpdated":"2026-10-08T20:49:23.240","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-106434","references":[{"url":"https://jira.mongodb.org/browse/MONGOCRYPT-966","label":"cna@mongodb.com"}],"tags":["nvd"],"ingestedAt":"2026-10-08T20:06:22.183Z","slug":"CVE-2026-106434","body":"## Overview\n\nThe 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}