# CVE-2026-96747: Forced local Unix socket connection via dot-sock KMS endpoint in client-side field encryption

> CVE-2026-96747: Forced local Unix socket connection via dot-sock KMS endpoint in client-side field encryption. CVSS 5.0 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-96747
Last updated: 2026-09-24T21:04:40Z

- Published: 2026-09-24 18:18 UTC · Updated: 2026-09-24 21:04 UTC · Assigner: mongodb
- CVSS: 5.0 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
- EPSS: 0.19%, 9th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-918

## Description

The client-side field level encryption support in the MongoDB Python Driver can treat a key management endpoint value ending in ".sock" as a local Unix domain socket path rather than a remote host. A user with write access to the encryption key metadata stored in the database can cause an application using the driver to open connections to local sockets on the application host. Data sent over these connections is limited to the start of a TLS handshake, so no chosen content is transmitted.

## Affected vendors and products

- MongoDB: Python Driver

## Tracked companies

- [MongoDB Atlas](https://rewindex.com/company/mongodb-atlas.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-96747)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-96747)
- [https://github.com/mongodb/mongo-python-driver/blob/4.18.2/doc/changelog.rst](https://github.com/mongodb/mongo-python-driver/blob/4.18.2/doc/changelog.rst)
- [https://github.com/mongodb/mongo-python-driver/releases/tag/4.18.2](https://github.com/mongodb/mongo-python-driver/releases/tag/4.18.2)
- [https://github.com/mongodb/mongo-python-driver/security/advisories/GHSA-qx36-8mw2-4r3x](https://github.com/mongodb/mongo-python-driver/security/advisories/GHSA-qx36-8mw2-4r3x)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-96747 · Markdown: https://rewindex.com/cve/CVE-2026-96747.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-96747 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:15:21.446Z