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MongoDB Rust Driver has certificate validation disabled when `tlsInsecure=False` appears in connection string

High severity GitHub Reviewed Published Oct 13, 2025 to the GitHub Advisory Database • Updated Oct 13, 2025

Package

cargo mongodb (Rust)

Affected versions

< 3.2.5

Patched versions

3.2.5

Description

When tlsInsecure=False appears in a connection string, certificate validation is disabled.

This vulnerability affects MongoDB Rust Driver versions prior to v3.2.5.

References

Published by the National Vulnerability Database Oct 13, 2025
Published to the GitHub Advisory Database Oct 13, 2025
Reviewed Oct 13, 2025
Last updated Oct 13, 2025

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(3rd percentile)

Weaknesses

Improper Certificate Validation

The product does not validate, or incorrectly validates, a certificate. Learn more on MITRE.

CVE ID

CVE-2025-11695

GHSA ID

GHSA-3p6w-gv5g-xjw9

Source code

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