CVE-2026-73509: Openlistteam Openlist

High severity, CVSS 7.6. EPSS: 0.5% chance of exploitation in the next 30 days.

OpenList a file list program that supports multiple storage. Prior to 4.2.4, the authenticated /api/fs/batch_rename handler in server/handles/fsbatch.go authorizes only the source directory produced by user.JoinPath(req.SrcDir) and validates renameObject.NewName with checkRelativePath, but does not validate attacker-controlled renameObject.SrcName, supplied as src_name, before concatenating it with the authorized path and passing the result to fs.Rename. A user with rename permission can use traversal segments in src_name to make path normalization select a file outside the authorized directory and configured base path, resulting in cross-user file integrity loss, limited availability impact, and file-existence disclosure through success or error responses. This issue is fixed in version 4.2.4.

Affected products

• Openlistteam Openlist: before 4.2.4 (fixed in 4.2.4)

Published 2026-08-13. Last modified 2026-09-18.