Mongodb Libmongocrypt vulnerabilities
6 vulnerabilities
Known vulnerabilities in Mongodb Libmongocrypt, newest first, with CVSS severity, EPSS, KEV listings, ransomware use and the affected versions.
CVE-2026-84962debianlibmongocrypt+2
EPSS score0.18%
An unauthorized user with key vault write access may cause an authorized client to issue arbitrary authenticated Google Cloud KMS API calls under the authorized user's identity, escalating database-level access into cloud key control and defeating client-side encryption.CVE-2026-84971debianlibmongocrypt+2EPSS score0.26%
Improper handling of an unexpected value size in the decryption path of a client-side encryption library can cause a failed internal check that terminates the process using the library. A party able to place a suitably formed encrypted value where an application will decrypt it, or able to control the responses the application receives, may cause that application to stop running.CVE-2026-106433debianlibmongocrypt+2EPSS score0.27%
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.CVE-2026-106434debianlibmongocrypt+2EPSS score0.11%
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.CVE-2026-106429debianlibmongocrypt+2EPSS score0.29%
An integer underflow in the KMS endpoint-parsing logic of MongoDB libmongocrypt can cause an allocation failure that terminates the application process. This can occur when an authenticated user modifies a key document in the key vault collection, or when an application accepts a KMS endpoint containing a colon after its path or query during key creation. The issue does not access memory outside its allocated bounds.CVE-2026-81523debianlibmongocrypt+2EPSS score0.10%
A missing input-validation issue in MongoDB libmongocrypt's automatic-encryption context setup allows a caller-supplied database identifier to be accepted without sanitization. The resulting impact is limited to incorrect schema selection, which may lead to limited disclosure or modification of information handled by the application.