How severe is CVE-2026-9741?

CVE-2026-9741 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-9741 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-9741?

CVE-2026-9741 affects Mongodb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-9741?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-9741 have an EU (EUVD) identifier?

Yes. CVE-2026-9741 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35859.

When was CVE-2026-9741 published?

CVE-2026-9741 was published on 2026-06-09 and last updated on 2026-06-18.

CVE-2026-9741

CVE-2026-9741 is a medium-severity vulnerability in Mongodb with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-319.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 7.1
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-35859
Weakness: CWE-319
Affected product: Mongodb
Published: 2026-06-09
Last modified: 2026-06-18

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.

Frequently asked questions

What is CVE-2026-9741?: 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.
How severe is CVE-2026-9741?: CVE-2026-9741 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-9741 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-9741?: CVE-2026-9741 affects Mongodb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-9741?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-9741 have an EU (EUVD) identifier?: Yes. CVE-2026-9741 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35859.
When was CVE-2026-9741 published?: CVE-2026-9741 was published on 2026-06-09 and last updated on 2026-06-18.

References

https://jira.mongodb.org/browse/SERVER-123507

Affected products (1)

cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*

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