CVE-2026-61843 FileRise: Unauthenticated File Overwrite Through Upload-Enabled Folder Shares
Unauthenticated users can overwrite existing files in shared folders or authenticated users can overwrite files they lack edit authority over.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-61843?
CVE-2026-61843 is a high-severity missing authorization vulnerability in error311 FileRise, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, 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 3.18.0, FileRise upload-enabled shared-folder and upload-only links do not reject a destination filename that already exists. An unauthenticated visitor with a valid share token and any configured share password can upload a file with the same name as an existing file and silently replace its content while the original uploader metadata remains. The same replacement gap affects ordinary authenticated uploads through /api/upload/upload.php and authenticated upload-only users who lack edit authority over the existing file. This issue is fixed in version 3.18.0.
Weakness: CWE-862
Which versions are affected by CVE-2026-61843?
How do I fix CVE-2026-61843?
No fix has been published for CVE-2026-61843 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-61843 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-61843 exists.
Sources
Also known as GHSA-r787-5hp3-4874.