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CVE-2026-48770

Notepad++ WM_COPYDATA COPYDATA_FULL_CMDLINE local DoS crash PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
notepad-plus-plus / notepad-plus-plusaffected < 8.9.6.1

CWE

CWE-125

References

ADP enrichment

CISA-ADP

No English description supplied.