CVE-2026-4744

CRITICAL

Notepad3 Bundled Oniguruma compile_string_node() Heap Buffer Overflow via Crafted Regex Pattern Allows Arbitrary Code Execution

Title source: cna

Description

Out-of-bounds Read vulnerability in rizonesoft Notepad3 (‎scintilla/oniguruma/src modules). This vulnerability is associated with program files regcomp.C‎. This issue affects Notepad3: before 6.25.714.1.

References (1)

[Patch] https://github.com/rizonesoft/Notepad3/pull/5392

Scores

CVSS v4 9.3

EPSS 0.0002

EPSS Percentile 5.7%

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/S:N/AU:N/R:U/V:D/RE:L/U:Amber

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-125

Status published

Products (1)

rizonesoft/Notepad3 < 6.25.714.1

Published Mar 24, 2026

Tracked Since Mar 24, 2026