What is CVE-2026-114649?

CVE-2026-114649 is a medium-severity vulnerability in MongoDB C# Driver, classified under CWE-1025. CVSS score: 6.8/10. Published 2026-10-22.

How severe is CVE-2026-114649?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Vulnerability in MongoDB C# Driver

CVE-2026-114649

The MongoDB C# Driver compares TLS client certificates by issuer and serial number only when deciding whether two clients can share cached connections. In an application that creates clients from certificates supplied by different users, a user who provides a certificate copying another user's issuer and serial number, without that user's private key, can be given connections authenticated with the other user's certificate. Database operations can then run under the other user's identity, affecting the confidentiality and integrity of data that identity can access.

Published 2026-10-22.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

MongoDB C# Driver

Weakness classification (CWE)

CWE-1025

References

Frequently asked questions

What is CVE-2026-114649?: CVE-2026-114649 is a medium-severity vulnerability in MongoDB C# Driver, classified under CWE-1025. CVSS score: 6.8/10. Published 2026-10-22.
How severe is CVE-2026-114649?: Medium severity. CVSS v3 base score is 6.8 out of 10.