CVE-2026-9741: A bug in query analysis processing of the $vectorSearch aggregation stage for Queryable Encryption (QE) or Client-Side Field Level Encryption (CSFLE) results…

PriorityP334medium6.5CVSS 3.1

AVNACLPRLUINSUCHINAN

EPSS

0.10%

1.2th percentile

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.

Affected

4 ranges

Vendor	Product	Version range	Fixed in
mongodb	mongodb_server	>= 7.0.0 < 7.0.35	7.0.35
mongodb	mongodb_server	>= 8.0.0 < 8.0.24	8.0.24
mongodb	mongodb_server	>= 8.2.0 < 8.2.10	8.2.10
mongodb	mongodb_server	>= 8.3.0 < 8.3.3	8.3.3

CVSS provenance

nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

nvdv4.07.1HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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