Cloudanix VulnDB

CVE-2026-96749

High · 8.4

CVSS

8.4

EPSS

0.1%

Published

Sep 24, 2026

CISA due date

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The record

An integer overflow in the BSON document encoding component of the MongoDB Python Driver's bundled native extension may occur when a single document is built from an unusually large amount of caller-supplied data. Size arithmetic is performed in a signed 32-bit type, and the guard meant to catch the overflow is written in a form whose behavior is not defined by the C language standard. A party with no privileges who can place a very large value into data that an application encodes may, depending on how the native extension was built, cause a write outside the bounds of an allocated buffer inside the application's own process.

Affected packages

Ecosystem Package Introduced Fixed

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