Security Advisory

CVE-2026-48770

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-06-26 20:22:17

Last updated 2026-06-29 12:11:59

Assigner GitHub_M

CVSS score 5.0

State PUBLISHED

Description

Notepad++ is a free and open-source source code editor. Prior to 8.9.6.1, a local process in the same interactive Windows session can send a malformed WM_COPYDATA message to Notepad++ using the COPYDATA_FULL_CMDLINE path. The handler appears to process COPYDATASTRUCT.lpData as an unbounded NUL-terminated wchar_t* instead of enforcing COPYDATASTRUCT.cbData. This vulnerability is fixed in 8.9.6.1.

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