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.

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Tue, 03 Nov 2026 16:30:00 +0000

Type Values Removed Values Added
Description 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.
Title mongofiles may write outside the working directory through a symlink
Weaknesses CWE-59
References
Metrics cvssV3_1

{'score': 2.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N'}

cvssV4_0

{'score': 1, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: mongodb

Published:

Updated: 2026-11-03T17:44:21.089Z

Reserved: 2026-10-30T14:07:57.894Z

Link: CVE-2026-119673

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-03T17:18:06.803

Modified: 2026-11-03T17:18:06.803

Link: CVE-2026-119673

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses