Unrated severityNVD Advisory· Published Jul 1, 2026· Updated Jul 1, 2026
Path Disclosure and Path Traversal in MCO
CVE-2026-53906
Description
MCO is vulnerable to Path Disclosure and Path Traversal in file handling functionality related to data export and upload. Improper validation of the filename parameter allows writing files to arbitrary locations as well as indirect disclosure of absolute server paths through error messages.
Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions.
Patches
Vulnerability mechanics
References
2- cert.pl/en/posts/2026/07/CVE-2026-53902mitrethird-party-advisory
- mco.mycomplianceoffice.commitreproduct
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