CVE-2026-9741

Client side encryption fails to encrypt values in a $vectorSearch

CVE-2026-9741 is fixed in MongoDB on 1 platform by MongoDB 8.3.3 (version 8.3.3), released May 28, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

7.1

No vendor severity

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0010

0th 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.

Where it's fixed

Product	Fixed in	Fix	Released
Windows apps
MongoDB	8.3.3	MongoDB 8.3.3	May 28, 2026

Details

Published
June 9, 2026
Weakness
CWE-319: Cleartext transmission of sensitive information
Vendor advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-9741

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