CVE-2026-87899 Privilege escalation in cPanel
Critical 9.4
Published
Updated
Check this codebase for CVE-2026-87899 and fix it if it is affected.
What it is: CVE-2026-87899 is a critical vulnerability in WebPros cPanel, published on 23 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-87899 in the wild and no public exploit code.
Affected product: WebPros cPanel. 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-2026-87899/ (Markdown: https://insights.sbomify.com/CVE-2026-87899/index.md)
Remote authenticated users can execute arbitrary code with root privileges due to unnecessary privilege execution in cPanel.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-87899?
CVE-2026-87899 is a critical vulnerability in WebPros cPanel, published on 23 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Execution with unnecessary privileges in cPanel allows remote authenticated users to execute arbitrary code with root privileges.
Weakness: CWE-250
Which versions are affected by CVE-2026-87899?
How do I fix CVE-2026-87899?
No fix has been published for CVE-2026-87899 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-87899 being exploited?
There is no known exploitation of CVE-2026-87899 in the wild and no public exploit code.
Sources
Also known as GHSA-9m4j-95hw-qv52.