# CVE-2026-65816: Azure Arc Elevation of Privilege Vulnerability

> An attacker can elevate privileges in Azure Arc due to incorrect name resolution, requiring a patch to mitigate the risk.

- **Severity:** Critical 10.0 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/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:** 20 Aug 2026
- **Updated:** 28 Oct 2026
- **Also known as:** GHSA-mxqx-57v7-6jqc

## What is CVE-2026-65816?

CVE-2026-65816 is a critical vulnerability in Microsoft Azure Web Apps, published on 20 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Use of incorrectly-resolved name or reference in Azure Arc allows an unauthorized attacker to elevate privileges over a network.

Weakness: CWE-706 (Use of Incorrectly-Resolved Name or Reference)

## Which versions are affected by CVE-2026-65816?

It affects 1 product.


Products: Microsoft Azure Web Apps.

## How do I fix CVE-2026-65816?

No fix has been published for CVE-2026-65816 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-65816 being exploited?

There is no known exploitation of CVE-2026-65816 in the wild and no public exploit code.

## Other vulnerabilities in Microsoft Azure Web Apps

- [CVE-2026-32211](https://insights.sbomify.com/CVE-2026-32211/): Azure MCP Server Information Disclosure Vulnerability (critical 9.1)
- [CVE-2024-38194](https://insights.sbomify.com/CVE-2024-38194/): Azure Web Apps Elevation of Privilege Vulnerability (high 8.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-65816 and fix it if it is affected.

What it is: CVE-2026-65816 is a critical vulnerability in Microsoft Azure Web Apps, published on 20 Aug 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-2026-65816 in the wild and no public exploit code.

Affected product: Microsoft Azure Web Apps. 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-2026-65816/ (Markdown: https://insights.sbomify.com/CVE-2026-65816/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-65816
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-65816
- OSV: https://osv.dev/vulnerability/CVE-2026-65816

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-65816/
Summaries are generated and may contain mistakes; the official description above is the record.