---
id: CVE-2026-57581
title: DotVVM is an open source MVVM framework for web applications
summary: >-
  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
  DotvvmFileUploadMi…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-434
vendor: riganti
product: dotvvm
affected:
  - dotvvm < 4.2.11
  - 'dotvvm >= 4.3.0, < 4.3.15'
  - 'dotvvm >= 5.0.0-preview01, < 5.0.0-preview09-final'
published: '2026-09-14'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T16:17:13.207'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-57581'
references:
  - url: >-
      https://github.com/riganti/dotvvm/commit/1635245b5eaf9ccf8e3536b9d8b1941819526585
    label: security-advisories@github.com
  - url: >-
      https://github.com/riganti/dotvvm/commit/4fc26a8591c76fb92ed701352c2a84120cf926c5
    label: security-advisories@github.com
  - url: >-
      https://github.com/riganti/dotvvm/commit/6af982bbe3b00bdac00f1c0efe9365d52db642ef
    label: security-advisories@github.com
  - url: 'https://github.com/riganti/dotvvm/releases/tag/v4.3.15'
    label: security-advisories@github.com
  - url: 'https://github.com/riganti/dotvvm/releases/tag/v5.0.0-preview09'
    label: security-advisories@github.com
  - url: 'https://github.com/riganti/dotvvm/security/advisories/GHSA-2rm3-333w-xvc4'
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-16T15:56:11.624857Z'
epss: 0.00593
epssPercentile: 0.46077
ingestedAt: '2026-09-14T19:13:23.459Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.