Notepad++ 8.9.3 Format String Injection via nativeLang.xml_CVE-2026-6539

4.6 / 10

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

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.

Basic Information

ID CVE-2026-6539

Source VulnCheck

Published Apr 30, 2026 at 20:31

Modified Apr 30, 2026 at 20:46

Affected Product

Vendor Notepad++

Product Notepad++

Affected Versions Notepad++ Notepad++ 0

CWE Classification

CWE-134

References

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    "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.",
    "published": "2026-04-30T20:31:54.961Z",
    "modified": "2026-04-30T20:46:17.910Z",
    "type": "cve",
    "title": "Notepad++ 8.9.3 Format String Injection via nativeLang.xml",
    "source": "VulnCheck",
    "references": "https://notepad-plus-plus.org/news/v894-released/\nhttps://www.vulncheck.com/advisories/notepad-format-string-injection-via-nativelang-xml",
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