本ページは notepad-plus-plus notepad\+\+ に影響する公開済み CVE（NVD の CPE 経由で関連付け）を列挙します。各行に深刻度指標・概要・公開日が含まれます。
| CVE | 概要 | ソース | CVSS 最大値 | EPSS（%） | 公開 | 更新 |
|---|---|---|---|---|---|---|
| CVE-2026-52885 | Notepad++ is a free and open-source source code editor. Prior to 8.9.6.4, NppCommands.cpp checks the HMAC of the on-disk shortcuts.xml at the moment a user command fires (Time-of-Check). However, the command payload is taken from the in-memory _userCommands vector, which is populated at application startup and never re-synchronized with the on-disk file (Time-of-Use). Swapping shortcuts.xml between startup and command execution causes the HMAC check to validate a clean file while a malicious com | [email protected] | 7.5 | 0.13% | 2026-06-26 | 2026-06-29 |
| CVE-2026-52884 | 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 ShellExe | [email protected] | 7.8 | 0.15% | 2026-06-26 | 2026-06-29 |
| CVE-2026-48800 | 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 | [email protected] | 7.8 | 0.38% | 2026-06-26 | 2026-06-30 |
| CVE-2026-48778 | Notepad++ is a free and open-source source code editor. Prior to 8.9.6.1, the <GUIConfig name="commandLineInterpreter"> tag in config.xml is read by NppXml::value() (Parameters.cpp:6430) and stored in _nppGUI._commandLineInterpreter without any validation, whitelist, or digital signature check. When the user triggers IDM_FILE_OPEN_CMD (File → Open Containing Folder → cmd), NppCommands.cpp:228 creates a Command object with this value and calls run(), which invokes ShellExecute (RunDlg.cpp:221) wi | [email protected] | 7.8 | 1.31% | 2026-06-26 | 2026-06-29 |
| CVE-2026-48770 | 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. | [email protected] | 5.0 | 0.27% | 2026-06-26 | 2026-06-29 |
| CVE-2026-46710 | Notepad++ is a free and open-source source code editor. From 8.9.4 until 8.9.6, Notepad++ contains a local privilege escalation vulnerability in the installer. During installation, the installer invokes powershell.exe without using an absolute path after setting the working directory to the installation contextMenu directory. If an attacker can pre-place a malicious powershell.exe in a user-writable custom installation directory, and a privileged user later runs the installer and selects that di | [email protected] | 7.5 | 0.11% | 2026-06-26 | 2026-06-29 |
| CVE-2026-6539 | Notepad++ 8.9.3 contains a format string injection vulnerability in the Find Results panel handler that allows attackers to cause denial of service and information disclosure by crafting a malicious nativeLang.xml language pack file. Attackers can distribute a poisoned language pack through community channels that triggers format string interpretation when a user performs search operations, leading to access violations and potential leakage of stack or register contents. | [email protected] | 4.6 | 0.19% | 2026-04-30 | 2026-06-17 |
| CVE-2026-5525 | A stack-based buffer overflow vulnerability exists in Notepad++ version 8.9.3 in the file drop handler component. When a user drags and drops a directory path of exactly 259 characters without a trailing backslash, the application appends a backslash and null terminator without proper bounds checking, resulting in a stack buffer overflow and application crash (STATUS_STACK_BUFFER_OVERRUN). | 33c584b5-0579-4c06-b2a0-8d8329fcab9c | 6.0 | 0.17% | 2026-04-10 | 2026-06-17 |
| CVE-2026-25926 | Notepad++ is a free and open-source source code editor. An Unsafe Search Path vulnerability (CWE-426) exists in versions prior to 8.9.2 when launching Windows Explorer without an absolute executable path. This may allow execution of a malicious explorer.exe if an attacker can control the process working directory. Under certain conditions, this could lead to arbitrary code execution in the context of the running application. Version 8.9.2 patches the issue. | [email protected] | 7.3 | 0.25% | 2026-02-18 | 2026-06-17 |
| CVE-2025-15556 KEV | Notepad++ versions prior to 8.8.9, when using the WinGUp updater, contain an update integrity verification vulnerability where downloaded update metadata and installers are not cryptographically verified. An attacker able to intercept or redirect update traffic can cause the updater to download and execute an attacker-controlled installer, resulting in arbitrary code execution with the privileges of the user. | [email protected] | 7.7 | 1.27% | 2026-02-02 | 2026-06-17 |
| CVE-2023-47452 | An Untrusted search path vulnerability in notepad++ 6.5 allows local users to gain escalated privileges through the msimg32.dll file in the current working directory. | [email protected] | 7.8 | 0.53% | 2023-11-30 | 2026-06-17 |
| CVE-2023-6401 | A vulnerability classified as problematic was found in NotePad++ up to 8.1. Affected by this vulnerability is an unknown functionality of the file dbghelp.exe. The manipulation leads to uncontrolled search path. An attack has to be approached locally. The identifier VDB-246421 was assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way. | [email protected] | 5.3 | 0.33% | 2023-11-30 | 2026-06-17 |
| CVE-2023-40166 | Notepad++ is a free and open-source source code editor. Versions 8.5.6 and prior are vulnerable to heap buffer read overflow in `FileManager::detectLanguageFromTextBegining `. The exploitability of this issue is not clear. Potentially, it may be used to leak internal memory allocation information. As of time of publication, no known patches are available in existing versions of Notepad++. | [email protected] | 5.5 | 0.47% | 2023-08-25 | 2026-06-17 |
| CVE-2023-40164 | Notepad++ is a free and open-source source code editor. Versions 8.5.6 and prior are vulnerable to global buffer read overflow in `nsCodingStateMachine::NextStater`. The exploitability of this issue is not clear. Potentially, it may be used to leak internal memory allocation information. As of time of publication, no known patches are available in existing versions of Notepad++. | [email protected] | 5.5 | 0.55% | 2023-08-25 | 2026-06-17 |
| CVE-2023-40036 | Notepad++ is a free and open-source source code editor. Versions 8.5.6 and prior are vulnerable to global buffer read overflow in `CharDistributionAnalysis::HandleOneChar`. The exploitability of this issue is not clear. Potentially, it may be used to leak internal memory allocation information. As of time of publication, no known patches are available in existing versions of Notepad++. | [email protected] | 5.5 | 0.43% | 2023-08-25 | 2026-06-17 |
| CVE-2023-40031 | Notepad++ is a free and open-source source code editor. Versions 8.5.6 and prior are vulnerable to heap buffer write overflow in `Utf8_16_Read::convert`. This issue may lead to arbitrary code execution. As of time of publication, no known patches are available in existing versions of Notepad++. | [email protected] | 7.8 | 0.49% | 2023-08-25 | 2026-06-17 |
| CVE-2022-31902 | Notepad++ v8.4.1 was discovered to contain a stack overflow via the component Finder::add(). | [email protected] | 5.5 | 0.58% | 2023-01-31 | 2026-07-04 |
| CVE-2022-31901 | Buffer overflow in function Notepad_plus::addHotSpot in Notepad++ v8.4.3 and earlier allows attackers to crash the application via two crafted files. | [email protected] | 6.5 | 1.31% | 2023-01-19 | 2026-06-17 |
| CVE-2022-32168 | Notepad++ versions 8.4.1 and before are vulnerable to DLL hijacking where an attacker can replace the vulnerable dll (UxTheme.dll) with his own dll and run arbitrary code in the context of Notepad++. | [email protected] | 7.8 | 0.68% | 2022-09-28 | 2026-06-17 |
| CVE-2019-16294 | SciLexer.dll in Scintilla in Notepad++ (x64) before 7.7 allows remote code execution or denial of service via Unicode characters in a crafted .ml file. | [email protected] | 7.8 | 9.83% | 2019-09-14 | 2026-06-16 |