CVE-2026-4821 This CVE ID has been rejected or withdrawn by its CVE Numbering Authority as it was published in error.
Not scored
Published
Updated
Check this codebase for CVE-2026-4821 and fix it if it is affected.
What it is: CVE-2026-4821 is a vulnerability, published on 21 Apr 2026.
Exploitation: There is no known exploitation of CVE-2026-4821 in the wild and no public exploit code.
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-2026-4821/ (Markdown: https://insights.sbomify.com/CVE-2026-4821/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-4821?
CVE-2026-4821 is a vulnerability, published on 21 Apr 2026.
Official description
This CVE ID has been rejected or withdrawn by its CVE Numbering Authority as it was published in error.
Which versions are affected by CVE-2026-4821?
How do I fix CVE-2026-4821?
No fix has been published for CVE-2026-4821 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-4821 being exploited?
There is no known exploitation of CVE-2026-4821 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-6hg9-m8fv-wq83.