CVE-2026-9741

Client side encryption fails to encrypt values in a $vectorSearch

MEDIUM
6.5
CVSS Score
Published: June 9, 2026 at 09:56 PM UTC
Updated: July 23, 2026 at 07:32 PM UTC
1 product affected across 1 vendorMongoDB

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

7.0.0 ≤ v < 7.0.358.0.0 ≤ v < 8.0.248.2.0 ≤ v < 8.2.108.3.0 ≤ v < 8.3.37.0.08.0.08.2.08.3.0
Affected range stops below 7.0.35, so it looks safe — our inference, not a vendor statement
Affected range stops below 8.0.24, so it looks safe — our inference, not a vendor statement
Affected range stops below 8.2.10, so it looks safe — our inference, not a vendor statement
Affected range stops below 8.3.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

PatchVendor AdvisoryIssue Tracking
Source: cverecord
https://jira.mongodb.org/browse/SERVER-123507

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMmongodb
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-319

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