CVE-2026-6539
Notepad++ 8.9.3 Format String Injection via nativeLang.xml
CVSS Score
4.4
EPSS Score
0.0%
EPSS Percentile
0th
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 community channels that triggers format string interpretation when a user performs search operations, leading to access violations and potential leakage of stack or register contents.
| CWE | CWE-134 |
| Vendor | notepad++ |
| Product | notepad++ |
| Published | Apr 30, 2026 |
| Last Updated | Apr 30, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
Low
Affected Versions
Notepad++ / Notepad++
0 < 8.9.4
References
Credits
Hazley Samsudin