CVE-2026-106434
Unrecognized payload acceptance in explicit decryption in MongoDB libmongocrypt
CVSS Score
4.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-354 |
| Vendor | mongodb |
| Product | libmongocrypt |
| Ecosystems | |
| Industries | Technology |
| Published | Oct 8, 2026 |
| Last Updated | Oct 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
Affected Versions
MongoDB / libmongocrypt
1.5.0 < 1.20.5