CVE-2026-126838: Rust Driver public Client Debug output exposes CSFLE KMS master-key material
MongoDB · Rust Driver
Vendor fix available · Affected: MongoDB Rust Driver · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 0% of scored CVEs
DescriptionCVE.org
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.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- MongoDB · Rust Driverfrom 3.9.0 before 3.9.1; from 3.8.0 before 3.8.2; 3.7.0; 3.6.0; from 3.5.0 before 3.5.2; from 3.4.0 before 3.4.1 and 9 more
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- MongoDB
- Published
- November 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-126838 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.