CVE-2026-57233CWE-22path-traversal

CVE-2026-57233

High · published August 18, 2026

CVSS v3.1
8.1
EPSS
1%
Percentile
42.6
In the wild
Unconfirmed
What it is

Notepad++ is a free and open-source source code editor. Prior to 8.9.7, the WinGup decompress function joins untrusted ZIP entry names to unzipDestTo without canonical containment validation, allowing an entry such as ../mimeTools/mimeTools.dll to overwrite a DLL in a sibling plugin directory and execute attacker-controlled code when Notepad++ next loads that plugin. This issue is fixed in version 8.9.7.

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00509 · 42.6th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-08-18T00:16Z
References (5)
https://github.com/notepad-plus-plus/notepad-plus-plus/releases/tag/v8.9.7 · [email protected]https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-hjxw-84rf-wg5r · [email protected]https://github.com/notepad-plus-plus/wingup/commit/7670296a5c7fdec624e0a45dbde51059a7d735a8 · [email protected]https://github.com/notepad-plus-plus/wingup/pull/106 · [email protected]https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-hjxw-84rf-wg5r · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 17 AUG 20:10Z
    Notepad++: Path Traversal (Zip Slip) in WinGup Plugin Extraction
    cvelistv5