CVE-2026-81532: CWE-121: Stack-based Buffer Overflow in MongoDB BI Connector ODBC Driver
Description
CVE-2026-81532 is a high-severity stack-based buffer overflow vulnerability in the MongoDB BI Connector ODBC driver. It occurs when a user submits a positioned-cursor SQL statement with a cursor name longer than an internal fixed-length buffer. The driver does not properly bound the cursor name length before building its diagnostic message, leading to memory overwrite. This can cause the hosting application to crash and potentially allow execution of unintended code within the process.
CVSS v4.0
Score 8.7high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The MongoDB BI Connector ODBC driver contains a stack-based buffer overflow (CWE-121) triggered by a positioned-cursor statement with an excessively long cursor name. The vulnerability arises because the driver fails to check the length of the cursor name before copying it into a fixed-size buffer used in diagnostic messages. This memory corruption can terminate the hosting application and may enable code execution within its context. The CVSS v3.1 base score is 8.7, indicating high severity. No patch or official fix information is provided in the available data.
Potential Impact
Successful exploitation can cause the hosting application process to terminate unexpectedly and may allow an attacker to execute arbitrary code within the context of that process. This could lead to denial of service or potential privilege escalation depending on the hosting environment and application privileges.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid submitting positioned-cursor statements with untrusted or excessively long cursor names through the MongoDB BI Connector ODBC driver. Monitor vendor communications for updates on patches or official mitigations.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-ggj7-6w53-qw2v
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-81532"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a92f7d9acd9273b49e75ad0
Added to database: 08/29/2026, 15:16:41 UTC
Last enriched: 09/08/2026, 02:37:18 UTC
Last updated: 10/12/2026, 06:48:19 UTC
Views: 69
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