CVE-2026-96747 Forced local Unix socket connection via dot-sock KMS endpoint in client-side field encryption
An attacker with database write access can force the MongoDB Python Driver to connect to local Unix sockets via malicious KMS endpoints, bypassing network restrictions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-96747?
CVE-2026-96747 is a medium-severity server-side request forgery vulnerability in MongoDB Python Driver, published on 24 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-918
Which versions are affected by CVE-2026-96747?
3 open source packages ship an affected version, including pymongo.
| Package | Affected | Fixed in |
|---|---|---|
pymongo PyPI | From 3.9.0 | 4.18.2 |
pymongo PyPI | From 3.9.0 | 4.18.2 |
pymongo PyPI | From 3.9.0 | 4.18.2 |
How do I fix CVE-2026-96747?
Upgrade pymongo to 4.18.2 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-96747 being exploited?
There is no known exploitation of CVE-2026-96747 in the wild and no public exploit code.
Sources
Also known as AZL-105113, DEBIAN-CVE-2026-96747, ECHO-cab9-823f-652f, GHSA-qx36-8mw2-4r3x, MINI-rmgm-w249-p5rm, PYSEC-2026-4295 and 1 more.