CVE-2026-4744 CRITICAL

CVE-2026-4744: Notepad3 Bundled Oniguruma compile_string_node() Heap Buffer Overflow via Crafted Regex Pattern Allows Arbitrary Code Execution

Vendor Rizonesoft

Product Notepad3

Weakness CWE-125

Published March 24, 2026

Last update March 24, 2026

View on NVD All CVEs

CVSS base score

9.3/10

Attack vector Local

Attack complexity Low

Privileges required None

User interaction —

Confidentiality —

Integrity —

CVSS 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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 24, 2026 CVE published

March 24, 2026 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-4744 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/125.html

Related vulnerabilities

04Related CVE

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