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MongoDB Python Driver EUVDEUVD-2026-86346

| CVE-2026-96747 MEDIUM
Server-Side Request Forgery (SSRF) (CWE-918)
2026-09-24 mongodb GHSA-qx36-8mw2-4r3x
5.3
CVSS 4.0 · Vendor: mongodb
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Severity by source

Vendor (mongodb) PRIMARY
5.3 MEDIUM
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
vuln.today AI
5.0 MEDIUM

PR:L because the attacker must already have write access to encryption key metadata; S:C and C:L reflect connections reaching local sockets beyond the driver's authority; no chosen content means I:N/A:N.

3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N
SUSE
4.3 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Red Hat
4.3 MEDIUM
qualitative

Primary rating from Vendor (mongodb).

CVSS VectorVendor: mongodb

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

3
Analysis Generated
Sep 24, 2026 - 19:07 vuln.today
Patch available
Sep 24, 2026 - 19:04 EUVD
CVE Published
Sep 24, 2026 - 18:18 cve.org
MEDIUM 5.3

Blast Radius

ecosystem impact
† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth
  • 21 pypi packages depend on pymongo (18 direct, 3 indirect)

Ecosystem-wide dependent count for version 3.9.0.

DescriptionCVE.org

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.

AnalysisAI

The MongoDB Python Driver (PyMongo) versions 3.9.0 through 4.18.1 can be induced to open connections to local Unix domain sockets on the application host when an attacker who already holds write access to the encryption key metadata in the database alters a key management (KMS) endpoint value so that it ends in '.sock' - a string the client-side field level encryption (CSFLE) code path mistakes for a local socket path instead of a remote host. Exploitation requires the opt-in, non-default CSFLE feature to be in use and an authenticated attacker with database-side write access to the key vault, and it is only reachable over the network in the sense that CVSS scores the vector AV:N/PR:L; the transmitted bytes are restricted to the beginning of a TLS handshake, so no attacker-chosen content reaches the socket and data exfiltration or arbitrary remote-host reachability is not achievable. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires (1) the application to use the MongoDB Python Driver's client-side field level encryption (CSFLE) feature - a non-default, opt-in capability - and (2) the attacker to already hold WRITE access to the encryption key metadata stored in the database, allowing modification of the key management (KMS) endpoint value to a string ending in '.sock'. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment This is a genuinely low-priority, low-risk issue despite the CWE-918 SSRF classification. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade the MongoDB Python Driver to 4.18.2 or later - this is the vendor-released patch - as advertised in the GitHub release tag (https://github.com/mongodb/mongo-python-driver/releases/tag/4.18.2) and detailed in the 4.18.2 changelog (https://github.com/mongodb/mongo-python-driver/blob/4.18.2/doc/changelog.rst); no server-side MongoDB upgrade is required because the flaw lies in the driver. … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Module for Package Hub 15 SP7 Fixed
openSUSE Leap 16.0 Fixed
openSUSE Tumbleweed Fixed
SUSE Linux Enterprise Module for Package Hub 15 SP7 Affected
SUSE Linux Enterprise Module for Package Hub 15 SP4 Affected

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EUVD-2026-86346 vulnerability details – vuln.today

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