# CVE-2026-3563: Denial of service in PowerShell Universal

> Authenticated users can override system routes via improper input validation, causing denial of service in PowerShell Universal.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Mar 2026
- **Updated:** 17 Mar 2026
- **Also known as:** GHSA-gx25-v2f3-ppxq

## What is CVE-2026-3563?

CVE-2026-3563 is a medium-severity denial of service vulnerability in Devolutions PowerShell Universal, published on 17 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Improper input validation in the apps and endpoints configuration in PowerShell Universal before 2026.1.4 allows an authenticated user with permissions to create or modify Apps or Endpoints to override existing application or system routes, resulting in unintended request routing and denial of service via a conflicting URL path.

Weakness: CWE-1289 (Improper Validation of Unsafe Equivalence in Input)

## Which versions are affected by CVE-2026-3563?

It affects 1 product.


Products: Ironmansoftware Powershell Universal.

## How do I fix CVE-2026-3563?

No fix has been published for CVE-2026-3563 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-3563 being exploited?

There is no known exploitation of CVE-2026-3563 in the wild and no public exploit code.

## Other vulnerabilities in Devolutions PowerShell Universal

- [CVE-2023-49213](https://insights.sbomify.com/CVE-2023-49213/): Command injection in n/a (high 8.8)
- [CVE-2022-45183](https://insights.sbomify.com/CVE-2022-45183/): Privilege escalation in n/a (high 8.8)
- [CVE-2026-4064](https://insights.sbomify.com/CVE-2026-4064/): Missing authorization in PowerShell Universal (high 8.3)
- [CVE-2022-45184](https://insights.sbomify.com/CVE-2022-45184/): Path traversal in n/a (high 7.2)
- [CVE-2026-0618](https://insights.sbomify.com/CVE-2026-0618/): Cross-site scripting in PowerShell Universal (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-3563 and fix it if it is affected.

What it is: CVE-2026-3563 is a medium-severity denial of service vulnerability in Devolutions PowerShell Universal, published on 17 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-3563 in the wild and no public exploit code.

Affected product: Devolutions PowerShell Universal. 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-2026-3563/ (Markdown: https://insights.sbomify.com/CVE-2026-3563/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-3563
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-3563
- OSV: https://osv.dev/vulnerability/CVE-2026-3563

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-3563/
Summaries are generated and may contain mistakes; the official description above is the record.