# CVE-2026-96749: pymongo: An integer overflow in the BSON document encoding component of the MongoDB Python Driver's bundled native extension m...

CVE-2026-96749 is fixed in 10 products on 1 platform, first by SUSE-SU-2026:4398-1, released September 29, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-96749
- Priority: High
- CVSS: n/a (important)
- EPSS: 0.0019
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 24, 2026

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | pymongo Debian 14 | 4.18.2-1 | [DEBIAN-CVE-2026-96749](https://patchblox.com/security/data/fix/linux/debian-cve-2026-96749.md) | Oct 12, 2026 |
| Linux | python-pymongo opensuse-leap 16.0 | 4.6.3-bp160.2.1 | [OPENSUSE-SU-2026:22003-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22003-1.md) | Sep 29, 2026 |
| Linux | python-pymongo sles 15.7 | 3.11.0-150300.3.6.1 | [SUSE-SU-2026:4398-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4398-1.md) | Sep 29, 2026 |
| Linux | python-pymongo-debuginfo amzn 2023 | 3.10.1-5.amzn2023.0.5 | [ALAS2023-2026-3155](https://patchblox.com/security/data/fix/linux/alas2023-2026-3155.md) | Nov 7, 2026 |
| Linux | python-pymongo-debugsource amzn 2023 | 3.10.1-5.amzn2023.0.5 | [ALAS2023-2026-3155](https://patchblox.com/security/data/fix/linux/alas2023-2026-3155.md) | Nov 7, 2026 |
| Linux | python-pymongo-doc amzn 2023 | 3.10.1-5.amzn2023.0.5 | [ALAS2023-2026-3155](https://patchblox.com/security/data/fix/linux/alas2023-2026-3155.md) | Nov 7, 2026 |
| Linux | python3-bson amzn 2023 | 3.10.1-5.amzn2023.0.5 | [ALAS2023-2026-3155](https://patchblox.com/security/data/fix/linux/alas2023-2026-3155.md) | Nov 7, 2026 |
| Linux | python3-bson-debuginfo amzn 2023 | 3.10.1-5.amzn2023.0.5 | [ALAS2023-2026-3155](https://patchblox.com/security/data/fix/linux/alas2023-2026-3155.md) | Nov 7, 2026 |
| Linux | python3-pymongo amzn 2023 | 3.10.1-5.amzn2023.0.5 | [ALAS2023-2026-3155](https://patchblox.com/security/data/fix/linux/alas2023-2026-3155.md) | Nov 7, 2026 |
| Linux | python3-pymongo-debuginfo amzn 2023 | 3.10.1-5.amzn2023.0.5 | [ALAS2023-2026-3155](https://patchblox.com/security/data/fix/linux/alas2023-2026-3155.md) | Nov 7, 2026 |
| Linux | python3-pymongo-gridfs amzn 2023 | 3.10.1-5.amzn2023.0.5 | [ALAS2023-2026-3155](https://patchblox.com/security/data/fix/linux/alas2023-2026-3155.md) | Nov 7, 2026 |

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Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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