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CVE-2026-71858— Notepad++: shortcuts.xml Macro HMAC Bypass Enables Conditional Elevated Command Execution

Quick assessment

Affected
notepad-plus-plus notepad-plus-plus
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

notepad++是notepad++个人开发者开源的一款轻量级的代码与文本编辑工具。 Notepad++ 8.9.7之前版本存在安全漏洞，该漏洞源于从攻击者控制的shortcuts.xml加载的宏绕过UserDefinedCommands的HMAC验证，并可调用Scintilla操作和内部Open in Default Viewer命令，当本地攻击者影响settingsDir且用户触发宏时，可能导致修改受保护文件并在特定条件下执行提升权限的命令。

CVSS 5.4 · Medium EPSS 0.10% · P1

Affected Version Matrix 1

VendorProduct Version RangeStatus
notepad-plus-plus notepad-plus-plus < 8.9.7 affected
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I. Basic Information for CVE-2026-71858

Vulnerability Information
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Vulnerability Title
Notepad++: shortcuts.xml Macro HMAC Bypass Enables Conditional Elevated Command Execution
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Notepad++ 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
notepad++是notepad++个人开发者开源的一款轻量级的代码与文本编辑工具。 Notepad++ 8.9.7之前版本存在安全漏洞，该漏洞源于从攻击者控制的shortcuts.xml加载的宏绕过UserDefinedCommands的HMAC验证，并可调用Scintilla操作和内部Open in Default Viewer命令，当本地攻击者影响settingsDir且用户触发宏时，可能导致修改受保护文件并在特定条件下执行提升权限的命令。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
notepad-plus-plus notepad-plus-plus < 8.9.7 -

II. Public POCs for CVE-2026-71858

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III. Intelligence Information for CVE-2026-71858

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Patches & Fixes for CVE-2026-71858 (1)

Vendor Advisories for CVE-2026-71858 (1)

Vendor Pages for CVE-2026-71858 (1)

Same Patch Batch · notepad-plus-plus · 2026-08-17 · 4 CVEs total

CVE-2026-57233 8.1 HIGH Notepad++: Path Traversal (Zip Slip) in WinGup Plugin Extraction
CVE-2026-54758 7.8 HIGH Notepad++: Stack Buffer Overflow in expandNppEnvironmentStrs
CVE-2026-52886 5.1 MEDIUM Notepad++: session.xml backupFilePath starts_with Bypass

IV. Related Vulnerabilities

Same product: notepad-plus-plus
Same vendor: notepad-plus-plus
Same weakness: CWE-78

V. Comments for CVE-2026-71858

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