CVE-2021-26437 Visual Studio Code Spoofing Vulnerability
Medium 5.5
Published
Updated
Check this codebase for CVE-2021-26437 and fix it if it is affected.
What it is: CVE-2021-26437 is a medium-severity vulnerability in Microsoft Visual Studio Code, published on 15 Sep 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-26437 in the wild and no public exploit code.
Affected product: Microsoft Visual Studio Code. 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-2021-26437/ (Markdown: https://insights.sbomify.com/CVE-2021-26437/index.md)
Attackers can spoof content in Visual Studio Code, potentially misleading users about the source or nature of displayed information.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-26437?
CVE-2021-26437 is a medium-severity vulnerability in Microsoft Visual Studio Code, published on 15 Sep 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Visual Studio Code Spoofing Vulnerability
Which versions are affected by CVE-2021-26437?
It affects 1 product.
Products include Microsoft Visual Studio Code.
How do I fix CVE-2021-26437?
No fix has been published for CVE-2021-26437 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-26437 being exploited?
There is no known exploitation of CVE-2021-26437 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Visual Studio Code
- CVE-2026-81376 Visual Studio Code Security Feature Bypass Vulnerability
- CVE-2026-47281 Visual Studio Code Elevation of Privilege Vulnerability
- CVE-2026-78462 Visual Studio Code Security Feature Bypass Vulnerability
- CVE-2026-59113 Visual Studio Code Remote Code Execution Vulnerability
- CVE-2026-69320 Visual Studio Code Remote Code Execution Vulnerability
Sources
Also known as GHSA-gf96-mx62-w378.