Cleartext transmission of sensitive information in MongoDB Server - CVE-2026-9741
Published: August 18, 2026
Vulnerability identifier: #VU144161
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-9741
CWE-ID: CWE-319
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to cleartext transmission of sensitive information in the query analysis processing of the $vectorSearch aggregation stage when handling filter expressions for encrypted fields. A remote user can submit a query containing literal values for encrypted fields to disclose sensitive information.
This affects Queryable Encryption (QE) and Client-Side Field Level Encryption (CSFLE).
Affected software
MongoDB Server
How to mitigate CVE-2026-9741
Install security update from vendor's website.
MongoDB Server - addressed in versions 7.0.35, 8.0.24, 8.2.10, 8.3.3