CVE-2026-86056

Notepad++ is a free and open-source source code editor. Prior to 8.9.8, the NPPMSAVESESSION handler in PowerEditor/src/NppBigSwitch.cpp converts lParam to a sessionInfo pointer and dereferences its nbFile, files, and sessionFilePathName members without checking for null. A process running at the...

CVE-2026-86056

Versions of Notepad++ prior to 8.9.8 are vulnerable to a null pointer dereference in the NPPM_SAVESESSION handler located in PowerEditor/src/NppBigSwitch.cpp . The application fails to verify if lParam is null before dereferencing its nbFile , files , and sessionFilePathName members. An attacker ...

CVE-2026-86056 Notepad++: Null pointer dereference in NPPM_SAVESESSION message handler causes crash (DoS)

Notepad++ is a free and open-source source code editor. Prior to 8.9.8, the NPPMSAVESESSION handler in PowerEditor/src/NppBigSwitch.cpp converts lParam to a sessionInfo pointer and dereferences its nbFile, files, and sessionFilePathName members without checking for null. A process running at the...