CVE-2026-114649 Authentication bypass via issuer-and-serial-only certificate equality in shared cluster cache
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-114649?
CVE-2026-114649 is a high-severity vulnerability in MongoDB C# Driver, published on 22 Oct 2026.
Official description
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.
Weakness: CWE-1025
Which versions are affected by CVE-2026-114649?
How do I fix CVE-2026-114649?
No fix has been published for CVE-2026-114649 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-114649 being exploited?
There is no known exploitation of CVE-2026-114649 in the wild and no public exploit code.
Sources
Also known as GHSA-6gjm-424r-3jh2.