CVE-2026-93393
highpriority · track · 0EPSS 0.005 · 40 %ileDEUSEPSS · scored 2026-10-27
A heap-based buffer overflow exists in the TLS transport layer of the MongoDB C Driver when built with the Windows platform TLS backend. A remote endpoint that the client connects to can cause the driver to write uncontrolled data outside the bounds of a heap allocation while processing incoming encrypted traffic after the TLS handshake completes. No authentication or user interaction is required, because the affected processing occurs before any application-level authentication completes. Triggering this issue may lead to memory corruption in the client process, disclosure of adjacent heap memory, or termination of the process.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.2–9.2
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (29)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-3453MongoDB C Driver und Entity Framework Core Provider: Mehrere SchwachstellenDeutsch2026-09-17csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in MongoDB ausnutzen, um Informationen offenzulegen oder um einen Denial-of-Service-Zustand herbeizuführen.
sources
Which sources assert this record, and when.
references (1) nvd
External citations — patches, advisories, analysis.
- https://jira.mongodb.org/browse/CDRIVER-6417Vendor Advisory
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