Quick answers
- Is CVE-2026-58047 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-58047 being exploited in the wild.
- How severe is CVE-2026-58047?
- Informational severity, with a CVSS score of 5.6, published 31 July 2026.
- Which products and versions are affected?
- WebPros cPanel < 11.110.0.137, < 11.118.0.71, < 11.126.0.78, < 11.134.0.48, < 11.136.0.32, < 11.137.9999.99.
- Is there a fix for CVE-2026-58047?
- A patch was published on 2026-07-29: Targeted Security Release 137.9999.98 published Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-58047 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-58047?
- Check whether you run WebPros cPanel at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
An HTTP Request Smuggling vulnerability (CWE-444) exists in WebPros cPanel and WP Squared due to inconsistent interpretation of HTTP requests between front-end and back-end systems. An unauthenticated remote attacker can exploit this by sending specially crafted HTTP requests that are parsed differently by the proxy and the backend server. This allows the attacker to 'smuggle' a request into the next user's connection, potentially leading to the disclosure of sensitive information such as session cookies or login credentials. The vulnerability is addressed in various security releases including cPanel version 11.137.9999.98 and WP Squared 11.138.1.6.
Affected products
- WebPros cPanel < 11.110.0.137, < 11.118.0.71, < 11.126.0.78, < 11.134.0.48, < 11.136.0.32, < 11.137.9999.99
- WebPros WP Squared < 11.138.1.6
Timeline
- 2026-07-29: patched: Targeted Security Release 137.9999.98 published
- 2026-07-31: disclosed: CVE published to NVD via HackerOne