[CVE-2026-23512]There is a Untrusted Search Path vulnerability when Advanced Options setting is trigger.

[CVE-2026-23512]There is a Untrusted Search Path vulnerability when Advanced Options setting is trigger. Description SumatraPDF is a multi-format reader for Windows. In 3.5.2 and earlier, there is a Untrusted Search Path vulnerability when Advanced Options setting is trigger. The application executes notepad.exe without specifying an absolute path when using the Advanced Options setting. On Windows, this allows execution of a malicious notepad.exe placed in the application's installation directory, leading to arbitrary code execution. Impact It is a Untrusted Search Path vulnerability. To fix this vulnerability, the way notepad.exe is searched in sumatrapdf/src/AppTools.cpp should be changed.