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Description

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.

PUBLISHED Reserved 2026-05-27 | Published 2026-06-09 | Updated 2026-06-10 | Assigner mongodb




HIGH: 7.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Problem types

CWE-319 Cleartext transmission of sensitive information

Product status

Default status
unaffected

8.3.0 (custom) before 8.3.3
affected

8.2.0 (custom) before 8.2.10
affected

8.0.0 (custom) before 8.0.24
affected

7.0.0 (custom) before 7.0.35
affected

References

jira.mongodb.org/browse/SERVER-123507

cve.org (CVE-2026-9741)

nvd.nist.gov (CVE-2026-9741)

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