Forced local Unix socket connection via dot-sock KMS endpoint in client-side field encryption (CVE-2026-96747) | HOL Guard CVE

Medium · CVSS 5.3CVE-2026-96747

Forced local Unix socket connection via dot-sock KMS endpoint in client-side field encryption

Answer in brief

CVE-2026-96747 records a Medium severity (CVSS 5.3) vulnerability in Forced local Unix socket connection via dot-sock KMS endpoint in client-side field encryption. The current sources do not mark it as known exploited. The current feed maps MongoDB/Python Driver (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 24, 2026Updated Sep 24, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 24, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.3
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps MongoDB/Python Driver (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
MongoDB/Python Drivergeneric	>=3.9.0 <4.18.2	4.18.2

Recommended response

Check inventory. Check lockfiles and deployed manifests for MongoDB/Python Driver.
Review the reported fix. Update MongoDB/Python Driver to 4.18.2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.