Paper/Archive/CVE-2026-4744

CVE-2026-4744

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

EPSS 0.1%CVSS 9.3

critical.is priorityof 100

CVSS 9.3 (CNA)9.3 / 10 × 3027.9 Not in CISA KEV+300.0 EPSS percentile 1.9.019 × 200.4 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource

Notepad3< 6.25.714.16.25.714.1CNA

Scores by source

GovTech CSG (CNA)9.3CVSS: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 ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

patchgithub.com/rizonesoft/Notepad3/pull/5392