Notepad++ < 8.9.7 Multiple Vulnerabilities

The version of Notepad++ installed on the remote host is prior to 8.9.7. It is, therefore, affected by multiple vulnerabilities: - A security bypass vulnerability exists in session.xml backupFilePath handling due to an incomplete startswith check. An attacker could exploit this to bypass path...

Notepad++ 8.9.6.2 < 8.9.6.4 TOCTOU Race Condition (CVE-2026-52885)

The version of Notepad++ installed on the remote host is 8.9.6.2 or 8.9.6.3. It is, therefore, affected by a TOCTOU race condition vulnerability: - A time-of-check time-of-use TOCTOU race condition exists in the HMAC verification of shortcuts.xml. The HMAC check validates the on-disk file at...

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...

CVE-2026-48800

Notepad++ is a free and open-source source code editor. Prior to 8.9.6.1, the tag text content inside in shortcuts.xml is read by NppXml::valueaNode Parameters.cpp:3658 in the feedUserCmds function and stored in UserCommand.cmd without any validation. When the user clicks the corresponding entry ...

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 WMCOPYDATA message to Notepad++ using the COPYDATAFULLCMDLINE path. The handler appears to process COPYDATASTRUCT.lpData as an unbounded...

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 truste...

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...

CVE-2026-48770

Notepad++ prior to version 8.9.6.1 is affected by multiple issues arising from insecure handling of inter-process communication data. Specifically, a local attacker can trigger a denial of service (CVE-2026-48770) by sending a malformed WM_COPYDATA message where COPYDATA_FULL_CMDLINE is processed...

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 WMCOPYDATA message to Notepad++ using the COPYDATAFULLCMDLINE path. The handler appears to process COPYDATASTRUCT.lpData as an unbounded...

CVE-2026-48770 Notepad++ WM_COPYDATA COPYDATA_FULL_CMDLINE local DoS crash

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 WMCOPYDATA message to Notepad++ using the COPYDATAFULLCMDLINE path. The handler appears to process COPYDATASTRUCT.lpData as an unbounded...

CVE-2026-48778 Notepad++: Arbitrary Code Execution via config.xml commandLineInterpreter

Notepad++ is a free and open-source source code editor. Prior to 8.9.6.1, the 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 IDMFILEOPENCMD File → Open...

CVE-2026-48778

Notepad++ prior to 8.9.6.1 is affected by an RCE in config.xml: the value is read without validation and passed to ShellExecute when triggering File → Open Containing Folder → cmd, enabling attacker-controlled executable paths. The issue stems from NppXml::value() storing the value in _nppGUI._c...

CVE-2026-48778 Notepad++: Arbitrary Code Execution via config.xml commandLineInterpreter

Notepad++ is a free and open-source source code editor. Prior to 8.9.6.1, the 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 IDMFILEOPENCMD File → Open...

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...

CVE-2026-52885 Notepad++ TOCTOU: HMAC Checks Disk, Executes from Memory

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...

CVE-2026-52885

Notepad++ Notepad++ v8.9.6.4 fixes a TOCTOU vulnerability (CVE-2026-52885) where the on-disk HMAC of shortcuts.xml is checked at trigger time while the command payload is loaded into memory at startup and never synchronized. An attacker with write access to shortcuts.xml can plant a malicious fil...

CVE-2026-46710

Notepad++ is affected by a local privilege escalation vulnerability in the installer (CVE-2026-46710) detected in versions 8.9.4–8.9.6. During installation, the installer launches powershell.exe without an absolute path after setting the working directory to the installation contextMenu directory...

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

Notepad++ is a free and open-source source code editor. Prior to 8.9.6.1, the tag text content inside in shortcuts.xml is read by NppXml::valueaNode Parameters.cpp:3658 in the feedUserCmds function and stored in UserCommand.cmd without any validation. When the user clicks the corresponding entry ...

CVE-2026-48800

Notepad++ is a free and open-source source code editor. Prior to 8.9.6.1, the tag text content inside in shortcuts.xml is read by NppXml::valueaNode Parameters.cpp:3658 in the feedUserCmds function and stored in UserCommand.cmd without any validation. When the user clicks the corresponding entry ...

CVE-2026-52884

Notepad++ CVE-2026-52884 affects Notepad++ up to version 8.9.6.1 where isInTrustedDirectory() does not canonicalize paths before checking. The code uses a prefix-based trust check (PathIsPrefix or equivalent), allowing a path traversal like ....\ after a trusted directory prefix to resolve to an ...