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CVE-2026-52884— Notepad++: CVE-2026-48800 Bypass

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++是notepad++个人开发者开源的一款文本编辑器软件。 notepad++ 8.9.6.1版本存在路径遍历漏洞，该漏洞源于路径规范化问题，当检查路径前未进行标准化处理，使用基于前缀的检查方式，导致路径遍历攻击。

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-2026-52884

Vulnerability Information
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Vulnerability Title
Notepad++: CVE-2026-48800 Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
Notepad++ is a free and open-source source code editor. In v8.9.6.1, isInTrustedDirectory() does NOT canonicalize the path before checking. It uses a prefix-based check (PathIsPrefix() or equivalent) that matches paths starting with trusted directory strings. A path traversal using ..\..\ after a trusted directory prefix passes the check while resolving to an untrusted location. The CVE-2026-48800 patch adds isInTrustedDirectory() validation in Command::run() (RunDlg.cpp) before calling ShellExecute(). This function checks whether the resolved executable path is under a trusted directory. This vulnerability is fixed in 8.9.6.2.
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
路径等价：’filename.’ (尾部点号)
Source: CVE Program / CVE List V5
Vulnerability Title
notepad++ 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
notepad++是notepad++个人开发者开源的一款文本编辑器软件。 notepad++ 8.9.6.1版本存在路径遍历漏洞，该漏洞源于路径规范化问题，当检查路径前未进行标准化处理，使用基于前缀的检查方式，导致路径遍历攻击。
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-2026-52884

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 8828 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
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-52884

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Vendor Advisories for CVE-2026-52884 (1)

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

CVE-2026-48778 7.8 HIGH Notepad++: Arbitrary Code Execution via config.xml commandLineInterpreter
CVE-2026-48800 7.8 HIGH Notepad++: Arbitrary Code Execution via shortcuts.xml UserCommand Injection
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

V. Comments for CVE-2026-52884

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