# CVE-2026-59118: Copilot Cowork Elevation of Privilege Vulnerability

> An unauthorized attacker can elevate privileges in Microsoft Copilot Cowork due to improper authorization, requiring a patch.

- **Severity:** Critical 9.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 6 Aug 2026
- **Updated:** 28 Oct 2026
- **Also known as:** GHSA-jc2g-2frr-2pxq

## What is CVE-2026-59118?

CVE-2026-59118 is a critical vulnerability in Microsoft Copilot Cowork, published on 6 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Improper authorization in Copilot Cowork allows an unauthorized attacker to elevate privileges over a network.

Weakness: CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2026-59118?

It affects 1 product.


Products: Microsoft Power Apps.

## How do I fix CVE-2026-59118?

No fix has been published for CVE-2026-59118 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-59118 being exploited?

There is no known exploitation of CVE-2026-59118 in the wild and no public exploit code.

## Other vulnerabilities in Microsoft Copilot Cowork

- [CVE-2025-47733](https://insights.sbomify.com/CVE-2025-47733/): Microsoft Power Apps Information Disclosure Vulnerability (critical 9.1)
- [CVE-2026-26149](https://insights.sbomify.com/CVE-2026-26149/): Microsoft Power Apps Desktop Client Spoofing Vulnerability (critical 9.0)
- [CVE-2026-32172](https://insights.sbomify.com/CVE-2026-32172/): Microsoft Power Apps Remote Code Execution Vulnerability (high 8.0)
- [CVE-2026-20960](https://insights.sbomify.com/CVE-2026-20960/): PowerApps Desktop Client Remote Code Execution Vulnerability (high 8.0)
- [CVE-2023-32052](https://insights.sbomify.com/CVE-2023-32052/): Microsoft Power Apps (online) Spoofing Vulnerability (medium 5.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-59118 and fix it if it is affected.

What it is: CVE-2026-59118 is a critical vulnerability in Microsoft Copilot Cowork, published on 6 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-59118 in the wild and no public exploit code.

Affected product: Microsoft Copilot Cowork. 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-2026-59118/ (Markdown: https://insights.sbomify.com/CVE-2026-59118/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-59118
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-59118
- OSV: https://osv.dev/vulnerability/CVE-2026-59118

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-59118/
Summaries are generated and may contain mistakes; the official description above is the record.