CVE-2026-53906: Path Disclosure and Path Traversal in MCO
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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-53906?
CVE-2026-53906 has a medium severity rating of 5.1.
How do I fix CVE-2026-53906?
To remediate CVE-2026-53906, ensure proper validation of the filename parameter to prevent path traversal.
What type of vulnerability is CVE-2026-53906?
CVE-2026-53906 is a Path Disclosure and Path Traversal vulnerability.
What impact can CVE-2026-53906 have on my system?
CVE-2026-53906 can lead to arbitrary file writing and the exposure of sensitive server paths.
Which software is affected by CVE-2026-53906?
The vulnerability affects the MCO software.