{"id":"CVE-2026-57233","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-57233","summary":"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,…","details":"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.","published":"2026-08-17T20:16:44.453","modified":"2026-08-17T20:16:44.453","cvss":{"score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/notepad-plus-plus/wingup/commit/7670296a5c7fdec624e0a45dbde51059a7d735a8","label":"notepad-plus-plus/wingup@7670296"},"references":[{"type":"WEB","url":"https://github.com/notepad-plus-plus/notepad-plus-plus/releases/tag/v8.9.7"},{"type":"WEB","url":"https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-hjxw-84rf-wg5r"},{"type":"WEB","url":"https://github.com/notepad-plus-plus/wingup/commit/7670296a5c7fdec624e0a45dbde51059a7d735a8"},{"type":"WEB","url":"https://github.com/notepad-plus-plus/wingup/pull/106"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-08-17T20:16:44.453"}}