EUVD-2026-39906

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++ 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-2026-52885 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...

EUVD-2026-39905

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-2026-46710

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++ 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++: 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 ...

EUVD-2026-39904

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++: 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-2026-52884

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

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

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...

EUVD-2026-39903

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-2026-52884

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 ...

PT-2026-52973

Name of the Vulnerable Software and Affected Versions Notepad++ versions prior to 8.9.6.4 Description A Time-of-Check to Time-of-Use TOCTOU flaw exists in NppCommands.cpp. The application validates the HMAC of the shortcuts.xml file on disk when a user command is triggered, but it executes the...

PT-2026-52972

Name of the Vulnerable Software and Affected Versions Notepad++ versions 8.9.4 through 8.9.5 Description The installer contains a local privilege escalation issue. During the installation process, the installer invokes powershell.exe without specifying an absolute path after setting the working...

Exploit for CVE-2026-52885

TOCTOU: HMAC Checks Disk, Executes from Memory Notepad++ v8...

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...

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...