How severe is CVE-2026-81530?

CVE-2026-81530 has a CVSS 3.x base score of 5.6, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-81530 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-2026-81530?

CVE-2026-81530 affects Mongodb C# Driver. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-81530?

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

When was CVE-2026-81530 published?

CVE-2026-81530 was published on 2026-08-27 and last updated on 2026-09-29.

CVE-2026-81530

CVE-2026-81530 is a medium-severity vulnerability in Mongodb C# Driver with a CVSS 3.x base score of 5.6. 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 5.6)
CVSS v4: 6.8
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-532
Affected product: Mongodb C# Driver
Published: 2026-08-27
Last modified: 2026-09-29

Description

A weakness in the client-side encryption configuration surface of the MongoDB C# Driver causes sensitive key-management credential material supplied by the application to be reproduced verbatim in the driver's human-readable diagnostic representation of its client settings, instead of being masked as other secret fields are. A party able to read the application's logs, diagnostic output, or a process memory dump may thereby recover the plaintext credentials and use them to decrypt protected field data.

Frequently asked questions

What is CVE-2026-81530?: A weakness in the client-side encryption configuration surface of the MongoDB C# Driver causes sensitive key-management credential material supplied by the application to be reproduced verbatim in the driver's human-readable diagnostic representation of its client settings, instead of being masked as other secret fields are. A party able to read the application's logs, diagnostic output, or a process memory dump may thereby recover the plaintext credentials and use them to decrypt protected field data.
How severe is CVE-2026-81530?: CVE-2026-81530 has a CVSS 3.x base score of 5.6, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-81530 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-2026-81530?: CVE-2026-81530 affects Mongodb C# Driver. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-81530?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-81530 published?: CVE-2026-81530 was published on 2026-08-27 and last updated on 2026-09-29.

References

Affected products (1)

cpe:2.3:a:mongodb:c\#_driver:*:*:*:*:*:mongodb:*:*

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