CVE-2026-57581
MEDIUMDescription
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.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Exploit Intelligence
Low risk: more likely to be exploited than 38% of all known CVEs.
References
Related Vulnerabilities
Other CWE-434 (Unrestricted File Upload) vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2017-12617 | High | 8.1 | 100% | KEV | Fix |
| CVE-2018-15961 | Critical | 9.8 | 100% | KEV | - |
| CVE-2021-31207 | Medium | 6.6 | 100% | KEV + Ransom | Fix |
| CVE-2017-12615 | High | 8.1 | 100% | KEV + Ransom | - |
| CVE-2025-31324 | Critical | 10.0 | 100% | KEV + Ransom | - |
| CVE-2024-50623 | Critical | 9.8 | 99% | KEV + Ransom | Fix |
Common questions
How do I fix CVE-2026-57581?
No published fix for CVE-2026-57581 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2026-57581 being actively exploited?
Not that we know of. CVE-2026-57581 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.44% is the estimated probability that it will be exploited in the next 30 days. That is higher than 38% of all scored CVEs.
How severe is CVE-2026-57581?
CVE-2026-57581 has a CVSS v3 base score of 5.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-09-16.