CVE-2026-43888 Outline: Zip Extraction Path Escape via PATH_MAX Truncation in Collection Import

Outline is a service that allows for collaborative documentation. Prior to 1.7.0, ZipHelper.extract computes the extraction path for each entry by passing a full filesystem path through trimFileAndExt, a filename helper that calls path.basename on its input when truncating. When a zip entry's...

CVE-2026-43888

CVE-2026-43888 affects the Outline service prior to version 1.7.0. During ZIP extraction, ZipHelper.extract uses trimFileAndExt to compute the entry path; when a nested path plus the basename exceeds MAX_PATH_LENGTH (4096 bytes), directory components are silently dropped, yielding only a bare fil...