Notepad++: Path Traversal (Zip Slip) in WinGup Plugin Extraction

Description

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.

Scores

EPSS (exploitation in 30 days)

0.51% · top 56% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: poc · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.1.

Weakness

• CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (opens in a new tab)All about CWE-22 and its CVEs

Affected products

• notepad-plus-plus · notepad-plus-plus

  • affected < 8.9.7

References (4)

• https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-hjxw-84rf-wg5r (opens in a new tab)x_refsource_CONFIRMexploit
• https://github.com/notepad-plus-plus/wingup/pull/106 (opens in a new tab)x_refsource_MISC
• https://github.com/notepad-plus-plus/wingup/commit/7670296a5c7fdec624e0a45dbde51059a7d735a8 (opens in a new tab)x_refsource_MISC
• https://github.com/notepad-plus-plus/notepad-plus-plus/releases/tag/v8.9.7 (opens in a new tab)x_refsource_MISC

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-57233](https://trackcve.app/badge/CVE-2026-57233.svg)](https://trackcve.app/cve/CVE-2026-57233)

Record last updated 18 Aug 2026, 18:53 UTC.