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Security: CVE-2026-32993 – cPanel & WHM / WP2 Security Update – May 13, 2026

An unauthenticated endpoint in cpsrvd was found that could allow the insertion of arbitrary HTTP headers. This affects cPanel & WHM versions 132 and higher.

Critical 8.3 CVSS
cPanel

Default Update CMD

sudo /scripts/upcp --force

What this means under a SharedLicense license

Your SharedLicense license itself is not affected — this is a vulnerability in cPanel software, not in licensing. Licenses continue to work during and after the update; there is no need to re-issue or re-activate anything. If you resell cPanel under your own brand, patch client servers too — unpatched installs put your reputation at risk, not your license.

Situation

An unauthenticated endpoint in cpsrvd was found that could allow the insertion of arbitrary HTTP headers. This affects cPanel & WHM versions 132 and higher.

Impact

We have pushed out a patch in the following cPanel & WHM versions: 

  • 11.132.0.32 and higher
  • 11.134.0.26 and higher
  • 11.136.0.10 and higher

We have pushed out a patch in the following WP Squared version:

  • 11.136.1.12 and higher

Note: All further versions of cPanel are patched for this issue as well. Please see the latest changelogs for version information of each cPanel branch:
https://docs.cpanel.net/changelogs/

Call to Action

  1. Update the cPanel version on the server to one of the versions listed above. This can be done with the following:

    # /scripts/upcp –force

  2. Once completed, verify the cPanel version with the following to ensure the update was successful.

    # /usr/local/cpanel/cpanel -V

Additional Information

Additional security incidents are resolved in this latest release as well. Please see the following for more information:

Frequently Asked Questions

What is CVE-2026-32993?
Improper sanitization of the `status` query parameter of the `/unprotected/nova_error` endpoint allows unauthenticated attacker to inject arbitrary HTTP header to the response.
Is CVE-2026-32993 being exploited in the wild?
No confirmed exploitation is recorded. The EPSS model estimates a 0.3% probability of exploitation within the next 30 days — patch on your normal schedule.
How do I fix CVE-2026-32993?
Update cPanel to the patched release.Then confirm the running version matches the patched release listed above.
Why does this advisory list several CVEs?
One vendor release fixed multiple vulnerabilities. This advisory covers CVE-2026-32993, CVE-2026-29205, CVE-2026-29206, CVE-2026-32991, CVE-2026-32992 — updating to the patched release resolves all of them at once.

References

Security Advisories

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