CVE-2026-71858CWE-345CWE-693CWE-78command-injection

CVE-2026-71858

published August 18, 2026

CVSS
5.4
EPSS
0%
Percentile
1.8
In the wild
Unconfirmed
What it is

Notepad++ is a free and open-source source code editor. Prior to 8.9.7, macros loaded from an attacker-controlled shortcuts.xml bypass the HMAC validation applied to UserDefinedCommands and can invoke Scintilla actions and the internal Open in Default Viewer command in an elevated Notepad++ process, allowing protected file modification and conditional elevated command execution when a local attacker influences settingsDir and a user triggers the macro. This issue is fixed in version 8.9.7.

The record
Technical detail
CVSS
5.4 · NONE
CVSS v4.0
5.4 · CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00121 · 1.8th percentile
Weaknesses
CWE-345 · Insufficient Verification of Data Authenticity; CWE-693 · Protection Mechanism Failure; CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-08-18T00:16Z
References (4)
https://github.com/notepad-plus-plus/notepad-plus-plus/commit/7686e5a3025eaf1fb8e024c2ceb54670ea05f5fb · [email protected]https://github.com/notepad-plus-plus/notepad-plus-plus/releases/tag/v8.9.7 · [email protected]https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-f4rj-vqq4-wvg4 · [email protected]https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-f4rj-vqq4-wvg4 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 17 AUG 20:08Z
    Notepad++: shortcuts.xml Macro HMAC Bypass Enables Conditional Elevated Command Execution
    cvelistv5