Arbitrary file upload in Riganti Dotvvm
CVE-2026-57581
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.
Vulnerability class: Unrestricted File Upload
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Riganti Dotvvm — versions < 4.2.11, >= 4.3.0, < 4.3.15, >= 5.0.0-preview01, < 5.0.0-preview09-final
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-57581?
- CVE-2026-57581 is a medium-severity vulnerability in Riganti Dotvvm, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 5.3/10. Published 2026-09-14.
- How severe is CVE-2026-57581?
- Medium severity. CVSS v3 base score is 5.3 out of 10.