CVE-2026-114645: Heap overflow via 32-bit length wrap of the URI username in Windows Kerberos auth message wrapping
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.
Vector CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:H · CWE-190
Tracked companies
Mapped from the CVE’s affected-product data, NVD CPE matches, vendor advisories or package feeds. A mapping means the vendor’s software is named, not that its hosted service was exposed.
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
MongoDB: C Driver
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- github.com/mongodb/mongo-c-driver/releases/tag/1.30.14 (opens in new tab)
- github.com/mongodb/mongo-c-driver/releases/tag/2.5.7 (opens in new tab)
- github.com/mongodb/mongo-c-driver/security/advisories/GHSA-g9mw-2cwh-6hh9 (opens in new tab)
- jira.mongodb.org/browse/CDRIVER-6421 (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)