CVE-2026-114148 ASP.NET Core Elevation of Privilege Vulnerability
High 7.8
Published
Updated
Check this codebase for CVE-2026-114148 and fix it if it is affected.
What it is: CVE-2026-114148 is a high-severity vulnerability in Microsoft .NET 10.0 installed on Linux, published on 29 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-114148 in the wild and no public exploit code.
Affected product: Microsoft .NET 10.0 installed on Linux. 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-2026-114148/ (Markdown: https://insights.sbomify.com/CVE-2026-114148/index.md)
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-114148?
CVE-2026-114148 is a high-severity vulnerability in Microsoft .NET 10.0 installed on Linux, published on 29 Oct 2026.
Official description
Incorrect default permissions in ASP.NET Core allows an authorized attacker to elevate privileges locally.
Weakness: CWE-276
Which versions are affected by CVE-2026-114148?
How do I fix CVE-2026-114148?
Upgrade to a fixed version.
Is CVE-2026-114148 being exploited?
There is no known exploitation of CVE-2026-114148 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as BELL-CVE-2026-114148, UBUNTU-CVE-2026-114148.