CVE-2026-104109 FileRise: Authenticated ZIP extraction follows a pre-existing symlink and deletes files outside the storage root
Authenticated users can overwrite or delete files outside the storage root via symlink exploitation during ZIP extraction in FileRise.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-104109?
CVE-2026-104109 is a medium-severity path traversal vulnerability in error311 FileRise, published on 14 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
FileRise is a self-hosted web-based file manager with multi-file upload, editing, and batch operations. Prior to 3.23.0, FileRise validates archive entry names but extracts them directly into the authorized live destination before validating resolved paths. If that destination already contains a symlink to a directory outside the storage root, an authenticated non-administrator with extract permission who can upload or otherwise place an attacker-controlled ZIP in that folder can place an ordinary archive entry beneath the link. ZipArchive::extractTo() can then overwrite an external file, and post-extraction cleanup can delete that target through the same linked parent, only where the FileRise process has the required filesystem write or removal permission. The advisory does not establish that the attacker can create the prerequisite symlink through FileRise. This issue is fixed in version 3.23.0.
Weakness: CWE-59
Which versions are affected by CVE-2026-104109?
How do I fix CVE-2026-104109?
No fix has been published for CVE-2026-104109 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-104109 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-104109 exists.
Sources
Also known as GHSA-jp22-hh6w-mpwp.