# CVE-2026-4064: Missing authorization in PowerShell Universal

> Authenticated users can bypass role-based access controls to perform privileged operations, read sensitive data, and disrupt services in PowerShell Universal.

- **Severity:** High 8.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Mar 2026
- **Updated:** 17 Mar 2026
- **Also known as:** GHSA-979h-vff8-97jm

## What is CVE-2026-4064?

CVE-2026-4064 is a high-severity missing authorization vulnerability in Devolutions PowerShell Universal, published on 17 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Missing authorization checks on multiple gRPC service endpoints in PowerShell Universal before 2026.1.4 allows an authenticated user with any valid token to bypass role-based access controls and perform privileged operations — including reading sensitive data, creating or deleting resources, and disrupting service operations — via crafted gRPC requests.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-4064?

It affects 1 product.


Products: Ironmansoftware Powershell Universal.

## How do I fix CVE-2026-4064?

No fix has been published for CVE-2026-4064 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-4064 being exploited?

There is no known exploitation of CVE-2026-4064 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-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)
- [CVE-2026-3563](https://insights.sbomify.com/CVE-2026-3563/): Denial of service in PowerShell Universal (medium 5.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-4064 and fix it if it is affected.

What it is: CVE-2026-4064 is a high-severity missing authorization vulnerability in Devolutions PowerShell Universal, published on 17 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-4064 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-2026-4064/ (Markdown: https://insights.sbomify.com/CVE-2026-4064/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-4064
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-4064
- OSV: https://osv.dev/vulnerability/CVE-2026-4064

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-4064/
Summaries are generated and may contain mistakes; the official description above is the record.