MongoDB Database Tools 100.2.0-<100.20.1: Symlink Traversal in mongofiles get_regex
CVE-2026-119673 Published on November 3, 2026
mongofiles may write outside the working directory through a symlink
MongoDB Database Tools mongofiles does not resolve existing parent-directory symlinks when validating output paths for get_regex. An unauthorized user who can both upload a GridFS file and place a symlink in the operator's download working directory can cause a later retrieval to create a file containing unauthorized user-controlled data outside that directory, using the operator process's filesystem permissions. The issue can occur with default traversal and overwrite settings. Exploitation requires an operator to retrieve matching files from the affected working directory; the demonstrated default behavior creates a new file rather than overwriting an existing file. This issue affects MongoDB Database Tools versions 100.2.0 through versions before 100.20.1.
Vulnerability Analysis
CVE-2026-119673 can be exploited with local system access. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is an insecure temporary file Vulnerability?
The software attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
CVE-2026-119673 has been classified to as an insecure temporary file vulnerability or weakness.
Affected Versions
MongoDB Database Tools:- Version 100.2.0 and below 100.20.1 is affected.