How severe is CVE-2026-9735?

CVE-2026-9735 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-9735 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-9735?

CVE-2026-9735 affects Mongodb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-9735?

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

Does CVE-2026-9735 have an EU (EUVD) identifier?

Yes. CVE-2026-9735 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35856.

When was CVE-2026-9735 published?

CVE-2026-9735 was published on 2026-06-09 and last updated on 2026-06-17.

CVE-2026-9735

CVE-2026-9735 is a medium-severity vulnerability in Mongodb with a CVSS 3.x base score of 5.5. 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-532.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v4: 6.8
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-35856
Weakness: CWE-532
Affected product: Mongodb
Published: 2026-06-09
Last modified: 2026-06-17

Description

MongoDB server may log authentication parameters, including credentials, to the server log during SASL authentication. When connection health metric logging is enabled, the full authentication parameters are written to the log without redaction.

Frequently asked questions

What is CVE-2026-9735?: MongoDB server may log authentication parameters, including credentials, to the server log during SASL authentication. When connection health metric logging is enabled, the full authentication parameters are written to the log without redaction.
How severe is CVE-2026-9735?: CVE-2026-9735 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-9735 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-9735?: CVE-2026-9735 affects Mongodb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-9735?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-9735 have an EU (EUVD) identifier?: Yes. CVE-2026-9735 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35856.
When was CVE-2026-9735 published?: CVE-2026-9735 was published on 2026-06-09 and last updated on 2026-06-17.

References

https://jira.mongodb.org/browse/SERVER-126506

Affected products (1)

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

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