CVE-2026-57581 DotVVM: Unrestricted file upload
Unauthenticated attackers can upload files to configured storage, causing denial of service by filling disk space in DotVVM applications.
- 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-2026-57581?
CVE-2026-57581 is a medium-severity vulnerability in riganti dotvvm, published on 14 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
DotVVM is an open source MVVM framework for web applications. Prior to 4.2.11, 4.3.15, and 5.0.0-preview09-final, applications with configured file upload storage allow unauthenticated users to submit files directly to DotvvmFileUploadMiddleware without an X-DotVVM-UploadToken generated by the FileUpload component. An attacker can repeatedly upload files and fill application storage, causing denial of service. DotvvmConfiguration.Security.AuthorizeFileUpload can additionally restrict which users may upload files. This issue is fixed in versions 4.2.11, 4.3.15, and 5.0.0-preview09-final.
Weakness: CWE-434
Which versions are affected by CVE-2026-57581?
How do I fix CVE-2026-57581?
No fix has been published for CVE-2026-57581 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-57581 being exploited?
There is no known exploitation of CVE-2026-57581 in the wild and no public exploit code.
Sources
Also known as GHSA-2rm3-333w-xvc4.