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CVE-2026-81518: CWE-295: Improper Certificate Validation in MongoDB BI Connector

0
High
VulnerabilityCVE-2026-81518cvecve-2026-81518cwe-295
Published: 08/28/2026 (08/28/2026, 20:18:14 UTC)
Source: CVE Database V5
Vendor/Project: MongoDB
Product: BI Connector

Description

When mongosqld is configured with a client certificate authority file, the listener requests a client certificate during the TLS handshake but does not require one, so a client that presents no certificate is still accepted. In deployments that rely on client certificates as the sole means of identifying users, a remote party with network access to the listener can therefore establish a session and read the MongoDB data exposed through the connector.

CVSS v4.0

Score 8.7high

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Vuln. Confidentiality
High
Vuln. Integrity
None
Vuln. Availability
None
Subsq. Confidentiality
None
Subsq. Integrity
None
Subsq. Availability
None
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Technical Details

Data Version
5.2
Assigner Short Name
mongodb
Date Reserved
2026-08-26T22:07:10.996Z
Cvss Version
4.0
State
PUBLISHED
Remediation Level
null

Threat ID: 6a9206c9acd9273b4963cf5d

Added to database: 08/28/2026, 22:08:09 UTC

Last updated: 08/29/2026, 02:52:09 UTC

Views: 8

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