CVE-2026-6539
Notepad++ 8.9.3 Format String Injection via nativeLang.xml
- State
- Published
- Severity
- 4.6 Medium
- Published
- Apr 30, 2026
- Updated
- Jul 28, 2026
- Reserved
- Apr 17, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 4.6 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 4.4 Medium | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L | VulnCheck |
Weaknesses
- CWE-134 Use of Externally Controlled Format String
Affected Products
| Product | Versions |
|---|---|
Notepad++Notepad++ |
|
References
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