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Critical 9.3Published Mar 23, 2026
CVE-2026-4744Notepad3 Bundled Oniguruma compile_string_node() Heap Buffer Overflow via Crafted Regex Pattern Allows Arbitrary Code Execution
Updated under an hour ago ()
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It affects rizonesoft Notepad3. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 9.3 CRITICAL (v4.0, CNA)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
- Weakness (CWE)
- CWE-125
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GovTech CSG
- NVD analysis
- Awaiting Analysis
- Record last updated
- Mar 24, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
rizonesoft Notepad3 rizonesoft:notepad3 (from the name) | before 6.25.714.1 | CNA record |
References
- https://github.com/rizonesoft/Notepad3/pull/5392patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.