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.

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00073.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
MongoDB Rust Driver unaffected
Version Status Constraints
3.9.0 affected < 3.9.1
3.8.0 affected < 3.8.2
3.7.0 affected —
3.6.0 affected —
3.5.0 affected < 3.5.2
3.4.0 affected < 3.4.1
3.3.0 affected —
3.2.0 affected < 3.2.5
3.1.0 affected < 3.1.1
3.0.0 affected < 3.0.1
2.8.0 affected < 2.8.2
2.7.0 affected < 2.7.1
2.6.0 affected < 2.6.1
2.5.0 affected —
2.4.0 affected —

No data.

No data.

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Vendors Products
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Rust Driver Subscribe

Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://jira.mongodb.org/browse/RUST-2531 cve-icon cve-icon
History

Fri, 13 Nov 2026 02:45:00 +0000

Type Values Removed Values Added
First Time appeared Mongodb
Mongodb rust Driver
Vendors & Products Mongodb
Mongodb rust Driver

Thu, 12 Nov 2026 19:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Rust Driver public Client Debug output exposes CSFLE KMS master-key material
Weaknesses CWE-532
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}

cvssV4_0

{'score': 5.7, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mongodb

Published:

Updated: 2026-11-13T16:49:32.949Z

Reserved: 2026-11-11T21:57:44.011Z

Link: CVE-2026-126838

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-11-12T19:17:01.570

Modified: 2026-11-13T17:17:26.607

Link: CVE-2026-126838

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-13T17:15:21Z

Weaknesses