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OpenAdvisories
Medium · 4.4 CVE-2026-6539 EUVD-2026-26436GHSA-vfqp-r766-g759

Notepad++ 8.9.3 Format String Injection via nativeLang.xml

Published Apr 30, 2026 · Updated Jul 28, 2026 · Assigned by VulnCheck

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.

Affected products

VendorProductAffectedFixed
Notepad++ Notepad++ < 8.9.4 8.9.4

Advisories 1

References