# CVE-2026-80098: Copilot Studio Elevation of Privilege Vulnerability

> An attacker can elevate privileges in Microsoft Copilot Studio due to improper cryptographic signature verification.

- **Severity:** Critical 9.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/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:** Not needed
- **Fix available:** No
- **Published:** 3 Sep 2026
- **Updated:** 14 Oct 2026
- **Also known as:** GHSA-r9hf-26xj-x88v

## What is CVE-2026-80098?

CVE-2026-80098 is a critical vulnerability in Microsoft Copilot Studio, published on 3 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Improper verification of cryptographic signature in Copilot Studio allows an unauthorized attacker to elevate privileges over a network.

Weakness: CWE-347 (Improper Verification of Cryptographic Signature)

## Which versions are affected by CVE-2026-80098?

It affects 1 product.


Products: Microsoft Copilot Studio.

## How do I fix CVE-2026-80098?

No fix has been published for CVE-2026-80098 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-80098 being exploited?

There is no known exploitation of CVE-2026-80098 in the wild and no public exploit code.

## Other vulnerabilities in Microsoft Copilot Studio

- [CVE-2024-49038](https://insights.sbomify.com/CVE-2024-49038/): Microsoft Copilot Studio Elevation Of Privilege Vulnerability (critical 9.3)
- [CVE-2024-38206](https://insights.sbomify.com/CVE-2024-38206/): Microsoft Copilot Studio Information Disclosure Vulnerability (high 8.5)
- [CVE-2026-21520](https://insights.sbomify.com/CVE-2026-21520/): Copilot Studio Information Disclosure Vulnerability (high 7.5)
- [CVE-2024-43610](https://insights.sbomify.com/CVE-2024-43610/): Copilot Studio Information Disclosure Vulnerability (high 7.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-80098 and fix it if it is affected.

What it is: CVE-2026-80098 is a critical vulnerability in Microsoft Copilot Studio, published on 3 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-2026-80098 in the wild and no public exploit code.

Affected product: Microsoft Copilot Studio. 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-2026-80098/ (Markdown: https://insights.sbomify.com/CVE-2026-80098/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-80098
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-80098
- OSV: https://osv.dev/vulnerability/CVE-2026-80098

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-80098/
Summaries are generated and may contain mistakes; the official description above is the record.