CVE-2026-42214

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 85% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Notepad Next is a cross-platform, reimplementation of Notepad++. Prior to version 0.14, NotepadNext's detectLanguageFromExtension() function interpolates a file's extension directly into a Lua script without sanitization. An attacker can craft a filename whose extension contains Lua code, which executes automatically when the victim opens the file in NotepadNext. Because luaL_openlibs() is called unconditionally, the full os, io, and package libraries are available to the injected code, enabling arbitrary command execution. This issue has been patched in version 0.14.

CVSS v3
7.8
EG Score
7.8(medium)
EPSS
15.3%
KEV
Not listed

Published

May 7, 2026

Last Modified

May 12, 2026

Advisory Details (3)

Auto-updated May 7, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Improper Control of Generation of Code ('Code Injection') in dail8859/NotepadNext · Advisory · dail8859/NotepadNext · GitHub

https://github.com/dail8859/NotepadNext/security/advisories/GHSA-m5fq-c9x5-w54g
generic

Release v0.14 · dail8859/NotepadNext · GitHub

https://github.com/dail8859/NotepadNext/releases/tag/v0.14
generic

Merge commit from fork · dail8859/NotepadNext@f3ca1b1 · GitHub

https://github.com/dail8859/NotepadNext/commit/f3ca1b10aca52f05fd7f4f5ebf9b566d6cd95ccc

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 40× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 110 total refreshes for this CVE.

  1. 2026-07-16 17:03 UTCEPSS rescore
  2. 2026-07-16 09:53 UTCOSV refresh
  3. 2026-07-15 16:57 UTCEPSS rescore
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  1. 2026-06-26 22:13 UTCEG score recompute
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  18. 2026-06-15 02:40 UTCEG score recompute
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  21. 2026-06-13 23:00 UTCEPSS rescore
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  24. 2026-06-12 21:30 UTCEG score recompute
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  26. 2026-06-11 18:25 UTCEG score recompute
  27. 2026-06-11 14:00 UTCEPSS rescore
  28. 2026-06-11 07:23 UTCEG score recompute
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  64. 2026-06-01 13:52 UTCEPSS rescore
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  66. 2026-06-01 08:58 UTCEG score recompute
  67. 2026-05-31 22:30 UTCEPSS rescore
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  75. 2026-05-28 13:44 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-42214?
CVE-2026-42214 is a high vulnerability published on May 7, 2026. Notepad Next is a cross-platform, reimplementation of Notepad++. Prior to version 0.14, NotepadNext's detectLanguageFromExtension() function interpolates a file's extension directly into a Lua script without sanitization. An attacker can craft a filename whose extension contains Lua code, which…
When was CVE-2026-42214 disclosed?
CVE-2026-42214 was first published in the National Vulnerability Database on May 7, 2026, with the most recent update on May 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42214 actively exploited?
CVE-2026-42214 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-42214?
CVE-2026-42214 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-42214?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42214, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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