medium6.0
CVE-2026-5525
A stack-based buffer overflow vulnerability exists in Notepad++ version 8.9.3 in the file drop handler component.
Impact
A stack-based buffer overflow vulnerability exists in Notepad++ version 8.9.3 in the file drop handler component. When a user drags and drops a directory path of exactly 259 characters without a trailing backslash, the application appends a backslash and null terminator without proper bounds checking, resulting in a stack buffer overflow and application crash (STATUS_STACK_BUFFER_OVERRUN).
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Notepad-Plus-Plus | Notepad\+\+ | Version 8.9.3 |