Vulnerability in MongoDB Database Tools

[ Description ]Official description

MongoDB Database Tools mongorestore incorrectly URL-decodes an original collection name read from metadata when the corresponding dump filename has been truncated. A database user who can create and populate a suitably encoded collection can cause a later authorized directory restore to write those documents into a different collection that the user cannot modify directly. When both collection names resolve to the same destination, backed-up documents may be omitted; use of --drop can also replace the unintended destination collection. Exploitation requires an operator to restore the affected collection from a directory dump with write access to the destination. This issue affects MongoDB Database Tools versions 100.0.2 through versions before 100.20.1.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund3 Nov 2026WID-SEC-2026-4328

  MongoDB (EF Core Provider, Atlas SQL, C Treiber, Rust Treiber, Database Tools and Node.js Treiber): Multiple vulnerabilities Translated from German

  Risk mediumCVE-2026-119672CVE-2026-120954CVE-2026-120678+12 more CVEs

[ References ]References

• github.com/mongodb/mongo-tools/blob/master/CHANGELOG.md