Buffer Overflow Affecting mongo-c-driver package, versions [,2.2.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CONAN-MONGOCDRIVER-16438298
- published7 May 2026
- disclosed6 May 2026
- creditUnknown
Introduced: 6 May 2026
CVE-2026-6691 (opens in a new tab)How to fix?
Upgrade mongo-c-driver to version 2.2.0 or higher.
Overview
Affected versions of this package are vulnerable to Buffer Overflow via unsafe string copying in the canonicalization process. An attacker can execute arbitrary code or cause a denial of service by supplying a specially crafted username in the MongoDB URI with authMechanism=GSSAPI before authentication or network traffic occurs.