CVE-2026-48770

MediumCVSS 5.0/10Last modified Jun 29, 2026

Description

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.

Metrics

CVSS 3.1 5.0/10CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-125

Affected software

Vendor	Product	Versions
notepad-plus-plus	notepad-plus-plus	< 8.9.6.1

References

https://github.com/notepad-plus-plus/notepad-plus-plus/commit/f20a0888a92ce557a339b833cd9d9d8e97dc797dPatch
https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-r39g-3mcw-xcg2Exploit, Patch, Vendor Advisory, Mitigation
https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-r39g-3mcw-xcg2Exploit, Patch, Vendor Advisory, Mitigation

Timeline

Published: Jun 26, 2026
Last modified: Jun 29, 2026
NVD status: Analyzed

Related CVEs from 2026

CVE-2026-487718.2ishankportfolio is a portfolio website. Prior to version 1.0.1, contact form submissions could potentially be exposed due to improperly secu CVE-2026-4877210.0ProxySQL is a proxy for MySQL and its forks, as well as PostgreSQL. In versions 2.0.0 through 3.0.8, the ProxySQL MySQL frontend accepts the CVE-2026-487739.8ProxySQL is a proxy for MySQL and its forks, as well as PostgreSQL. Versions 2.0.18 through 3.0.8 have a pre-authentication heap memory corr CVE-2026-487747.5ProxySQL is a proxy for MySQL and its forks, as well as PostgreSQL. In versions 3.0.0 through 3.0.8, ProxySQL's GenAI/MCP `run_sql_readonly`CVE-2026-487756.8LangGraph SQLite Checkpoint is an implementation of LangGraph CheckpointSaver that uses SQLite DB (both sync and async, via aiosqlite). In v CVE-2026-487769.1LangGraph Python SDK is used to connect to running LangGraph API servers, manage assistants, threads and stream runs from Python application CVE-2026-487779.3FileBrowser Quantum is a free, self-hosted, web-based file manager. Versions prior to 1.3.2-stable, 1.4.0-beta and 1.4.1-beta are vulnerable CVE-2026-487787.8Notepad++ is a free and open-source source code editor. Prior to 8.9.6.1, the <GUIConfig name="commandLineInterpreter"> tag in config.xml is CVE-2026-487797.5ws is an open source WebSocket client and server for Node.js. All versions from 1.1.0 up to (but not including) 5.2.5, from 6.0.0 up to 6.2.CVE-2026-48787.0A flaw was found in libcap. A local unprivileged user can exploit a Time-of-check-to-time-of-use (TOCTOU) race condition in the `cap_set_fil CVE-2026-487808.2Forem is open source software for building communities. Prior to commit a2ab6d4, a maliciously crafted email address could allow an attacker CVE-2026-487819.9Postiz is an AI social media scheduling tool. In versions prior to 2.21.8, the Skool integration callback signed an attacker-controlled JSON