Out-of-bounds write in Notepad++ - #VU151933
Published: September 24, 2026
Vulnerability identifier: #VU151933
CSH Severity: Medium
CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-787
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 improper validation of an array index in FunctionParsersManager::getOverrideMapFromXmlTree when parsing an oversized langID attribute in Function List overrideMap.xml. A remote attacker can provide a crafted Function List configuration and induce the victim to open the Function List panel to cause a denial of service.
Affected software
Notepad++
Remediation
Install security update from vendor's website.
Notepad++ - update to 8.9.8.1