# CVE-2026-70178: Microsoft Fabric Elevation of Privilege Vulnerability

> An authorized attacker can elevate privileges in Microsoft Fabric due to missing authorization checks, requiring a vendor patch.

- **Severity:** High 8.5 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C`)
- **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:** 3 Sep 2026
- **Updated:** 26 Oct 2026
- **Also known as:** GHSA-cxfp-3qwv-3cv4

## What is CVE-2026-70178?

CVE-2026-70178 is a high-severity missing authorization vulnerability in Microsoft Fabric, published on 3 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Missing authorization in Microsoft Fabric allows an authorized attacker to elevate privileges over a network.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-70178?

It affects 1 product.


Products: Microsoft Fabric.

## How do I fix CVE-2026-70178?

No fix has been published for CVE-2026-70178 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-70178 being exploited?

There is no known exploitation of CVE-2026-70178 in the wild and no public exploit code.

## Other vulnerabilities in Microsoft Fabric

- [CVE-2026-69843](https://insights.sbomify.com/CVE-2026-69843/): Microsoft Fabric Elevation of Privilege Vulnerability (critical 10.0)
- [CVE-2026-63509](https://insights.sbomify.com/CVE-2026-63509/): Microsoft Fabric Elevation of Privilege Vulnerability (critical 9.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-70178 and fix it if it is affected.

What it is: CVE-2026-70178 is a high-severity missing authorization vulnerability in Microsoft Fabric, published on 3 Sep 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-2026-70178 in the wild and no public exploit code.

Affected product: Microsoft Fabric. 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-2026-70178/ (Markdown: https://insights.sbomify.com/CVE-2026-70178/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-70178
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-70178
- OSV: https://osv.dev/vulnerability/CVE-2026-70178

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-70178/
Summaries are generated and may contain mistakes; the official description above is the record.