CVE-2026-52884 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-52884HIGH

notepad-plus-plus notepad-plus-plus — Notepad++: CVE-2026-48800 Bypass

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   N   R  U  H  H  H    7.8   .0021   11.6     —

AFFECTED
  Product            Versions     Fixed
  notepad-plus-plus  = 8.9.6.1 –  —

TIMELINE
  Jun 8   Reserved by GitHub_M
  Jun 26  EXPLOIT PUBLISHED — CVE-2026-52884 (notepad-plus-plus). Public exploit reference added.
  Jun 26  Published (CNA: GitHub_M)

CWE-42 · CNA: GitHub_M · CVSS v3.1 · 2 references · NVD status: Analyzed

Description

Notepad++ is a free and open-source source code editor. In v8.9.6.1, isInTrustedDirectory() does NOT canonicalize the path before checking. It uses a prefix-based check (PathIsPrefix() or equivalent) that matches paths starting with trusted directory strings. A path traversal using ..\..\ after a trusted directory prefix passes the check while resolving to an untrusted location. The CVE-2026-48800 patch adds isInTrustedDirectory() validation in Command::run() (RunDlg.cpp) before calling ShellExecute(). This function checks whether the resolved executable path is under a trusted directory. This vulnerability is fixed in 8.9.6.2.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
June 8, 2026	Reserved	Reserved by GitHub_M
June 26, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-52884 (notepad-plus-plus). Public exploit reference added.
June 26, 2026	Published	Published (CNA: GitHub_M)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
notepad-plus-plus	notepad-plus-plus	—	= 8.9.6.1	—

Weaknesses

CWE-42

References (2)

https://github.com/notepad-plus-plus/notepad-plus-plus/commit/ea1508855e9c4528f6198ce9d345f13cb759ebf4 [Patch]
https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-p58x-r3c9-x9p6 [Exploit, Patch, Vendor Advisory]

Authoritative record: CVE-2026-52884 at cve.org

Vendors: notepad-plus-plus

Weaknesses: CWE-42

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-52884 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.