# CVE-2026-114645: Heap overflow via 32-bit length wrap of the URI username in Windows Kerberos auth message wrapping

> CVE-2026-114645: Heap overflow via 32-bit length wrap of the URI username in Windows Kerberos auth message wrapping. CVSS 5.2 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-114645
Last updated: 2026-10-23T19:45:03Z

- Published: 2026-10-22 19:13 UTC · Updated: 2026-10-23 19:45 UTC · Assigner: mongodb
- CVSS: 5.2 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:H
- EPSS: 0.17%, 6th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-190

## 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.

## Affected vendors and products

- MongoDB: C Driver

## Tracked companies

- [MongoDB Atlas](https://rewindex.com/company/mongodb-atlas.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-114645)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-114645)
- [https://github.com/mongodb/mongo-c-driver/releases/tag/1.30.14](https://github.com/mongodb/mongo-c-driver/releases/tag/1.30.14)
- [https://github.com/mongodb/mongo-c-driver/releases/tag/2.5.7](https://github.com/mongodb/mongo-c-driver/releases/tag/2.5.7)
- [https://github.com/mongodb/mongo-c-driver/security/advisories/GHSA-g9mw-2cwh-6hh9](https://github.com/mongodb/mongo-c-driver/security/advisories/GHSA-g9mw-2cwh-6hh9)
- [https://jira.mongodb.org/browse/CDRIVER-6421](https://jira.mongodb.org/browse/CDRIVER-6421)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-114645 · Markdown: https://rewindex.com/cve/CVE-2026-114645.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-114645 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:13:00.937Z