# CVE-2026-57578: DotVVM: Missing authorization in AuthorizeActionFilter

> Attackers can access protected commands and view models in DotVVM applications because the authorization filter fails to perform checks.

- **Severity:** Critical 9.2 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Sep 2026
- **Updated:** 14 Sep 2026
- **Also known as:** GHSA-c8qj-jx8j-fg2w

## What is CVE-2026-57578?

CVE-2026-57578 is a critical missing authorization 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, AuthorizeActionFilter performs no authorization because its explicit ICommandActionFilter.OnCommandExecutingAsync, IViewModelActionFilter.OnViewModelCreatedAsync, and IPresenterActionFilter.OnPresenterExecutingAsync implementations return completed tasks instead of invoking the corresponding checks. Applications relying on this filter can therefore expose protected commands, view models, or presenters to unauthorized requests without any special bypass technique. AuthorizeAttribute correctly implements the same interfaces and can be used as a workaround. This issue is fixed in versions 4.2.11, 4.3.15, and 5.0.0-preview09-final.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-57578?


## How do I fix CVE-2026-57578?

No fix has been published for CVE-2026-57578 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-57578 being exploited?

There is no known exploitation of CVE-2026-57578 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-57578 and fix it if it is affected.

What it is: CVE-2026-57578 is a critical missing authorization 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.
Exploitation: There is no known exploitation of CVE-2026-57578 in the wild and no public exploit code.

Affected product: riganti dotvvm. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-57578/ (Markdown: https://insights.sbomify.com/CVE-2026-57578/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-57578
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-57578
- OSV: https://osv.dev/vulnerability/CVE-2026-57578

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-57578/
Summaries are generated and may contain mistakes; the official description above is the record.