Time-of-check Time-of-use (TOCTOU) Race Condition Affecting notepad-plus-plus/notepad-plus-plus package, versions [,8.9.6.4)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-NOTEPADPLUSPLUSNOTEPADPLUSPLUS-17660819
- published28 Jun 2026
- disclosed26 Jun 2026
- creditUnknown
Introduced: 26 Jun 2026
CVE-2026-52885 (opens in a new tab)How to fix?
Upgrade notepad-plus-plus/notepad-plus-plus to version 8.9.6.4 or higher.
Overview
Affected versions of this package are vulnerable to Time-of-check Time-of-use (TOCTOU) Race Condition through the NppCommands.cpp process. An attacker can execute arbitrary commands by swapping the shortcuts.xml file between application startup and command execution, causing a malicious payload to be loaded into memory while the integrity check validates a legitimate file on disk. This is only exploitable if the attacker has write access to the shortcuts.xml file prior to application launch.