Unrated severityOSV Advisory· Published Jan 14, 2026· Updated Jan 14, 2026
SumatraPDF has an Untrusted Search Path in sumatrapdf/src/AppTools.cpp
CVE-2026-23512
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.
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Affected products
21.4split, 1.5split, 1.6split, …+ 1 more
- (no CPE)range: 1.4split, 1.5split, 1.6split, …
- (no CPE)range: <=3.5.2
Patches
Vulnerability mechanics
References
2- github.com/sumatrapdfreader/sumatrapdf/commit/2762e02a8cd7cb779c934a44257aac56ab7de673mitrex_refsource_MISC
- github.com/sumatrapdfreader/sumatrapdf/security/advisories/GHSA-rqg5-gj63-x4mvmitrex_refsource_CONFIRM
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