CVE-2026-126838
Rust Driver public Client Debug output exposes CSFLE KMS master-key material
CVSS Score
5.5
EPSS Score
0.0%
EPSS Percentile
0th
A MongoDB Rust Driver component that holds client-side field level encryption settings includes key management service credential material in its diagnostic formatting output without redaction. An application that records or displays this formatted output may place that material where a party with read access to the application's diagnostic output can see it, which may result in unintended disclosure of key material.
| CWE | CWE-532 |
| Vendor | mongodb |
| Product | rust driver |
| Ecosystems | |
| Industries | Technology |
| Published | Nov 12, 2026 |
Stay Ahead of the Next One
Get instant alerts for mongodb rust driver
Be the first to know when new medium vulnerabilities affecting mongodb rust driver are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
MongoDB / Rust Driver
3.9.0 < 3.9.1 3.8.0 < 3.8.2 3.7.0 3.6.0 3.5.0 < 3.5.2 3.4.0 < 3.4.1 3.3.0 3.2.0 < 3.2.5 3.1.0 < 3.1.1 3.0.0 < 3.0.1 2.8.0 < 2.8.2 2.7.0 < 2.7.1 2.6.0 < 2.6.1 2.5.0 2.4.0