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cPanel security advisory (AV26-861)
Serial Number: AV26-861 Date: August 28, 2026 As of August 27, 2026, cPanel is affected by vulnerabilities in the following products: • cPanel & WebHost Manager (WHM) software • Prior to 11.110.0.141 • Prior to 11.134.0.53 • Prior to 11.136.0.37 • Prior to 11.138.0.2 • Prior to WP2: 11.138.1.7 The Cyber Centre encourages users and administrators to review the provided web links and apply any necessary updates as they become available • Security: CVE-2026-65643 Vulnerability in cPanel’s Domain Parking Functionality - August 27, 2026 • cPanel Security cPanel security advisory (AV26-861) - Canadian Centre for Cyber Security
Critical cPanel Flaw Could Let One Hosting Customer Take Root Control of a Whole Server
cPanel has released patches for a security flaw affecting domain parking and addon domain functionality in cPanel and WebHost Manager (WHM), which could allow code execution as the root user. The vulnerability, assigned the CVE identifier CVE-2026-65643, impacts all supported versions of cPanel & WHM. cPanel described the issue as a critical security vulnerability and said that an
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