Resource exhaustion in Notepad++ - #VU144992
Published: August 24, 2026
Vulnerability identifier: #VU144992
CSH Severity: Medium
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in workspace path handling and custom toolbar path processing when parsing a crafted workspace file or loading a crafted toolbar configuration containing many delayed UNC paths. A remote attacker can supply many distinct network paths to cause a denial of service.
The GUI thread waits synchronously for each probe, and the cumulative blocking time grows with the number of distinct delayed targets.
Affected software
Notepad++
Remediation
Install security update from vendor's website.
Notepad++ - update to 8.9.8