CVE-2026-9741

EUVD-2026-35859
A bug in query analysis processing of the $vectorSearch aggregation stage for Queryable Encryption (QE) or Client-Side Field Level Encryption (CSFLE)  results in literal values for encrypted fields within the $vectorSearch stage filter expressions to be sent to the server as plaintext instead of ciphertext.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.5 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 1%
Affected Products (NVD)
VendorProductVersion
mongodbmongodb
7.0.0 ≤
𝑥
< 7.0.35
mongodbmongodb
8.0.0 ≤
𝑥
< 8.0.24
mongodbmongodb
8.2.0 ≤
𝑥
< 8.2.10
mongodbmongodb
8.3.0 ≤
𝑥
< 8.3.3
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://jira.mongodb.org/browse/SERVER-123507