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CVE-2026-48800— Notepad++: Arbitrary Code Execution via shortcuts.xml UserCommand Injection

Quick assessment

Affected
notepad-plus-plus notepad-plus-plus
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

notepad-plus-plus notepad++是notepad-plus-plus团队开源的一款文本编辑及源代码处理工具。 Notepad++ 8.9.6.1之前版本存在命令注入漏洞，该漏洞源于在feedUserCmds()函数中未对UserCommand._cmd进行任何验证，可能导致攻击者控制的可执行路径被调用，作为持久化机制。

CVSS 7.8 · High EPSS 0.21% · P10

Affected Version Matrix 1

VendorProduct Version RangeStatus
notepad-plus-plus notepad-plus-plus < 8.9.6.1 affected
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I. Basic Information for CVE-2026-48800

Vulnerability Information
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Vulnerability Title
Notepad++: Arbitrary Code Execution via shortcuts.xml UserCommand Injection
Source: CVE Program / CVE List V5
Vulnerability Description
Notepad++ is a free and open-source source code editor. Prior to 8.9.6.1, the <Command> tag text content inside <UserDefinedCommands> in shortcuts.xml is read by NppXml::value(aNode) (Parameters.cpp:3658) in the feedUserCmds() function and stored in UserCommand._cmd without any validation. When the user clicks the corresponding entry in the Run menu, NppCommands.cpp:4264 creates a Command object with string2wstring(ucmd.getCmd()) and calls run(), which invokes ShellExecute (RunDlg.cpp:221) with the attacker-controlled string as the executable path. The injected command appears as a normal menu item in the Run menu, making it a viable persistence mechanism. This vulnerability is fixed in 8.9.6.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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++ 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
notepad-plus-plus notepad++是notepad-plus-plus团队开源的一款文本编辑及源代码处理工具。 Notepad++ 8.9.6.1之前版本存在命令注入漏洞，该漏洞源于在feedUserCmds()函数中未对UserCommand._cmd进行任何验证，可能导致攻击者控制的可执行路径被调用，作为持久化机制。
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 < 8.9.6.1 -

II. Public POCs for CVE-2026-48800

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 8783 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-48800

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Patches & Fixes for CVE-2026-48800 (1)

Vendor Advisories for CVE-2026-48800 (1)

Same Patch Batch · notepad-plus-plus · 2026-06-26 · 6 CVEs total

CVE-2026-52884 7.8 HIGH Notepad++: CVE-2026-48800 Bypass
CVE-2026-48778 7.8 HIGH Notepad++: Arbitrary Code Execution via config.xml commandLineInterpreter
CVE-2026-48770 5.0 MEDIUM Notepad++ WM_COPYDATA COPYDATA_FULL_CMDLINE local DoS crash
CVE-2026-52885 Notepad++ TOCTOU: HMAC Checks Disk, Executes from Memory
CVE-2026-46710 Notepad++: Privilege Escalation in the Installer via Uncontrolled Executable Search Path

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-48800

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