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CVE-2026-48770

nvd nist
Published: Jun 26, 2026Modified: Jun 29, 2026

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5.0
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
Exploitability: 1.3 / Impact: 3.6
Source: security-advisories@github.com (Secondary)

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.

Affected (1)

Notepad Plus Plus
1 product
Notepad++
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Notepad++
Before 8.9.6.1

Related CWEs

CWE-125
Out-of-bounds Read
The product reads data past the end, or before the beginning, of the intended buffer.

References (3)

Source: security-advisories@github.com
Patch
Source: security-advisories@github.com
ExploitPatchVendor AdvisoryMitigation
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
ExploitPatchVendor AdvisoryMitigation

Timeline

No history available yet.