How severe is CVE-2026-81532?

CVE-2026-81532 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-81532 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-81532?

CVE-2026-81532 affects Mongodb Bi Connector Odbc Driver. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-81532?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-81532 published?

CVE-2026-81532 was published on 2026-08-28 and last updated on 2026-09-11.

CVE-2026-81532

CVE-2026-81532 is a high-severity vulnerability in Mongodb Bi Connector Odbc Driver with a CVSS 3.x base score of 8.8. 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-121.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 8.7
EPSS exploit prediction: 0% (40th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-121
Affected product: Mongodb Bi Connector Odbc Driver
Published: 2026-08-28
Last modified: 2026-09-11

Description

A user able to submit SQL through an application using the MongoDB Connector for BI ODBC driver can supply a positioned-cursor statement whose cursor name exceeds the size of an internal fixed-length buffer. Because the name length is not bounded before the driver builds its diagnostic message, memory adjacent to that buffer is overwritten with user-supplied content. This can terminate the hosting application process and may allow unintended code to run within it.

Frequently asked questions

What is CVE-2026-81532?: A user able to submit SQL through an application using the MongoDB Connector for BI ODBC driver can supply a positioned-cursor statement whose cursor name exceeds the size of an internal fixed-length buffer. Because the name length is not bounded before the driver builds its diagnostic message, memory adjacent to that buffer is overwritten with user-supplied content. This can terminate the hosting application process and may allow unintended code to run within it.
How severe is CVE-2026-81532?: CVE-2026-81532 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-81532 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-81532?: CVE-2026-81532 affects Mongodb Bi Connector Odbc Driver. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-81532?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-81532 published?: CVE-2026-81532 was published on 2026-08-28 and last updated on 2026-09-11.

References

https://github.com/mongodb/mongo-bi-connector-odbc-driver/releases

Affected products (1)

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

More vulnerabilities in Mongodb Bi Connector Odbc Driver

CVE-2026-19001 — Critical (CVSS 9.8): The MongoDB BI Connector ODBC Driver may write outside the bounds of a fixed-size buffer when an application supplies…
CVE-2026-19004 — High (CVSS 8.1): An application using the MongoDB BI Connector ODBC Driver may experience a memory-safety issue when processing output…
CVE-2026-19002 — High (CVSS 8.1): A missing bounds check when parsing stored procedure parameter metadata in the MongoDB BI Connector ODBC Driver can…
CVE-2026-19003 — High (CVSS 7.8): A data source definition containing an over-length file path setting may cause the MongoDB BI Connector ODBC Driver…
CVE-2026-81533 — High (CVSS 7.1): An application using the MongoDB BI Connector ODBC Driver may encounter a memory-safety issue when a submitted SQL…
CVE-2026-18888 — Medium (CVSS 6.5): The MongoDB BI Connector ODBC Driver converts floating point column values into text without checking that the result…

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