CVE-2026-105157A security vulnerability has been detected in RainyGao DocSys up to 2.02.85. The affected element is the function DocController.doGetTmp of the file /Doc/doGetTmpFile.do of the component Document Controller. The manipulation of the argument path/fileName leads to path traversal. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.