CVE-2026-114645 Heap overflow via 32-bit length wrap of the URI username in Windows Kerberos auth message wrapping
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-114645?
CVE-2026-114645 is a medium-severity vulnerability in MongoDB C Driver, published on 22 Oct 2026.
Official description
A 32-bit integer wraparound in the MongoDB C Driver's Windows-only Kerberos/SSPI authentication code can cause an undersized heap buffer to be allocated when an excessively long credential value is supplied in the client's connection configuration. A party able to control that client-side configuration, in conjunction with the affected authentication mechanism, can cause the driver to write outside the bounds of the allocated buffer. This may result in corruption of client process memory and denial of service of the client application. The issue affects only client builds compiled with the Windows-native authentication backend.
Weakness: CWE-190
Which versions are affected by CVE-2026-114645?
How do I fix CVE-2026-114645?
No fix has been published for CVE-2026-114645 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-114645 being exploited?
There is no known exploitation of CVE-2026-114645 in the wild and no public exploit code.
Sources
Also known as GHSA-g9mw-2cwh-6hh9, UBUNTU-CVE-2026-114645.