CVE-2026-9741

MEDIUM

6.5

CVSS v3

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.

CWE-319

How to fix

Remediation Available

MongoDBWindows application

Affected:8.0.0 8.0.24Fixed in:8.0.24MongoDB Inc.

Affected:8.2.0 8.2.10Fixed in:8.2.10MongoDB Inc.

Affected:7.0.0 7.0.35Fixed in:7.0.35MongoDB Inc.

Affected:8.3.0 8.3.3Fixed in:8.3.3MongoDB Inc.

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.10%probability of exploitation in 30 days

1stpercentile

Low risk: more likely to be exploited than 1% of all known CVEs.

References

Patch1

jira.mongodb.org

Related Vulnerabilities

Other CWE-319 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2018-12710	High	8.0	77%	-	-
CVE-2024-25735	Critical	9.1	51%	-	Fix
CVE-2019-3993	High	7.5	46%	-	-
CVE-2017-5259	High	8.8	31%	-	-
CVE-2016-5649	Critical	9.8	24%	-	-
CVE-2021-39341	High	8.2	22%	-	-

Common questions

How do I fix CVE-2026-9741?

Upgrade MongoDB to 8.0.24 or later.

Is CVE-2026-9741 being actively exploited?

Not that we know of. CVE-2026-9741 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.10% is the estimated probability that it will be exploited in the next 30 days. That is higher than 1% of all scored CVEs.

How severe is CVE-2026-9741?

CVE-2026-9741 has a CVSS v3 base score of 6.5, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-9741 affect?

Published advisories record a fix for MongoDB (Windows application). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-23.