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Fencer Vulns
medium 5.0

CVE-2026-96747 json

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

published 2026-09-24 45 d ago modified 2026-10-15 25 d ago also GHSA-qx36-8mw2-4r3x , PYSEC-2026-4295 , EUVD-2026-86346

cvss
5.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 8%
public exploits
0
none known

Summary

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.

Patch / fix

  • pypi pymongo 4.18.2
  • MongoDB Python Driver 4.18.2
  • pymongo Debian 14 4.18.2-1

debian advisories DEBIAN-CVE-2026-96747

  • python-pymongo SLE Module for Package Hub 15 SP7 3.11.0-150300.3.6.1

suse advisories SUSE-SU-2026:4398-1

  • python-pymongo openSUSE Tumbleweed 4.18.2-1.1
  • python-pymongo openSUSE Leap 16.0 4.6.3-bp160.2.1

opensuse advisories openSUSE-SU-2026:11935-1openSUSE-SU-2026:22003-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-96747 updated cvss 4.3

pymongo: pymongo: Forced local socket connection via manipulated key management endpoint

  • Red Hat OpenShift AI (RHOAI) rhoai/odh-ogx-core-rhel9, rhoai/odh-llama-stack-core-rhel9, rhoai/odh-pipeline-runtime-pytorch-cuda-py312-rhel9, rhoai/odh-pipeline-runtime-pytorch-rocm-py312-rhel9, rhoai/odh-workbench-jupyter-pytorch-cuda-py312-rhel9, rhoai/odh-workbench-jupyter-pytorch-rocm-py312-rhel9, +9 more
    affected: workaround, no fix available “Fix deferred”
  • Red Hat OpenStack Platform 13 (Queens) python-bson, python-pymongo-gridfs, python-pymongo 3.0.3-2.el7ost Red Hat OpenStack Platform 16.2 rhosp-rhel8/openstack-horizon, rhosp-rhel8/openstack-zaqar-wsgi Red Hat OpenStack Platform 17.1 python3-bson, python3-pymongo, rhosp-rhel9/openstack-horizon
    affected: workaround, no fix planned “Out of support scope”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
45 d ago

Exploit prediction

0.19% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 5.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N
CNA 3.1 5.0 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
CNA 4.0 5.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
OSV 3.1 5.0 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
GitHub 3.1 5.0 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
pypi pymongo
>=3.9.0, <4.18.2
4.18.2

Affected products

  • MongoDB Python Driver

Classification

Weakness
  • CWE-918 Server-Side Request Forgery
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.