How severe is CVE-2026-75159?

CVE-2026-75159 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-75159 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-75159?

CVE-2026-75159 affects Mongodb Bi Connector. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-75159?

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

When was CVE-2026-75159 published?

CVE-2026-75159 was published on 2026-08-27 and last updated on 2026-09-23.

CVE-2026-75159

CVE-2026-75159 is a medium-severity vulnerability in Mongodb Bi Connector with a CVSS 3.x base score of 5.9. 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-415.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v4: 8.2
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-415
Affected product: Mongodb Bi Connector
Published: 2026-08-27
Last modified: 2026-09-23

Description

An unauthenticated client that can reach a MongoDB Connector for BI deployment configured with Kerberos authentication may cause mongosqld to terminate when a crafted authentication exchange encounters a specific GSSAPI error-handling condition. This can interrupt BI Connector availability until the process restarts.

Frequently asked questions

What is CVE-2026-75159?: An unauthenticated client that can reach a MongoDB Connector for BI deployment configured with Kerberos authentication may cause mongosqld to terminate when a crafted authentication exchange encounters a specific GSSAPI error-handling condition. This can interrupt BI Connector availability until the process restarts.
How severe is CVE-2026-75159?: CVE-2026-75159 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-75159 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-75159?: CVE-2026-75159 affects Mongodb Bi Connector. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-75159?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-75159 published?: CVE-2026-75159 was published on 2026-08-27 and last updated on 2026-09-23.

References

https://www.mongodb.com/docs/bi-connector/current/release-notes/#mongodb-connector-for-bi-2.14.30

Affected products (1)

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

More vulnerabilities in Mongodb Bi Connector

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CVE-2026-81518 — High (CVSS 7.5): When mongosqld is configured with a client certificate authority file, the listener requests a client certificate…
CVE-2026-81517 — High (CVSS 7.5): An unauthenticated party able to reach the port of a MongoDB Connector for BI (mongosqld) instance may generate enough…
CVE-2026-77184 — Medium (CVSS 5.2): In MongoDB Connector for BI, the description text of a collection's JSON schema validator is incorporated into the…

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