CVE-2026-83938 Azure Kubernetes Configuration Service Elevation of Privilege Vulnerability
Critical 10.0
Published
Updated
Check this codebase for CVE-2026-83938 and fix it if it is affected.
What it is: CVE-2026-83938 is a critical vulnerability in Microsoft Azure Kubernetes Configuration Service, published on 22 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-83938 in the wild and no public exploit code.
Affected product: Microsoft Azure Kubernetes Configuration Service. 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-2026-83938/ (Markdown: https://insights.sbomify.com/CVE-2026-83938/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-83938?
CVE-2026-83938 is a critical vulnerability in Microsoft Azure Kubernetes Configuration Service, published on 22 Oct 2026.
Official description
Missing authentication for critical function in Azure Kubernetes Configuration Service allows an unauthorized attacker to elevate privileges over a network.
Weakness: CWE-306
Which versions are affected by CVE-2026-83938?
How do I fix CVE-2026-83938?
No fix has been published for CVE-2026-83938 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-83938 being exploited?
There is no known exploitation of CVE-2026-83938 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-2vxx-fgvw-2r33.