CVE-2026-119674

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.

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

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

• MEDIUMCVE-2026-109955PoC
• MEDIUMCVE-2026-111757PoC
• MEDIUMCVE-2026-118655PoC
• MEDIUMCVE-2026-118663PoC
• UNSCOREDCVE-2026-93903

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