CVE-2026-81522 Affecting mongo-cxx-driver package, versions <4.5.1-1
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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-MONGOCXXDRIVER-19425046
- published29 Aug 2026
- disclosed27 Aug 2026
Introduced: 27 Aug 2026
CVE-2026-81522 (opens in a new tab)How to fix?
Upgrade Debian:unstable mongo-cxx-driver to version 4.5.1-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream mongo-cxx-driver package and not the mongo-cxx-driver package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
A weakness in the MongoDB C++ Driver's handling of caller-supplied namespace identifiers allows special characters embedded in those identifiers. An application that builds a namespace identifier from untrusted input without validating it may therefore have its operation directed at a different target than intended. This can result in limited unauthorized read and write access to data belonging to another logical tenant of the affected application.