CVE-2026-4744CWE-125

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

Critical · published March 24, 2026

CVSS v4.0
9.3
EPSS
0%
Percentile
6.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
9.3 · CRITICAL
Vector
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
EPSS
0.00175 · 6.6th percentile
Weakness
CWE-125 · Out-of-bounds Read
Published
2026-03-24T03:26Z
EPSS history
Timeline
  • 24 MAR 03:26Z
    Notepad3 Bundled Oniguruma compile_string_node() Heap Buffer Overflow via Crafted Regex Pattern Allows Arbitrary Code Execution
    cvelistv5