CVE-2026-6539

MEDIUM

4.4

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.

CVE Details

CVSS v3.1 Score4.4

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L

Attack VectorLOCAL

ComplexityLOW

Privileges RequiredNONE

User InteractionREQUIRED

Published4/30/2026

Last Modified5/1/2026

Sourcenvd

Honeypot Sightings0

Affected Products

notepad-plus-plus:notepad\+\+

Weaknesses (CWE)

CWE-134

References

https://notepad-plus-plus.org/news/v894-released/(disclosure@vulncheck.com)

https://www.vulncheck.com/advisories/notepad-format-string-injection-via-nativelang-xml(disclosure@vulncheck.com)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.