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CVE-2026-43633

CRITICAL · CVSS 10 EPSS 1.07% Public Exploit

Source: NVD + CISA KEV + EPSS · Published: 2026-05-19 · Last synced: 2026-06-17

CyberRota Analysis

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Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
code execution

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-43633
Severity
CRITICAL
CVSS
10
EPSS
1.07%

Original NVD Description

HestiaCP versions 1.9.0 through 1.9.4 contain a deserialization vulnerability in the web terminal component caused by a session format mismatch between PHP and Node.js that allows unauthenticated remote attackers to achieve root-level code execution. Attackers can inject crafted data into HTTP headers that are processed by the PHP session handler but incorrectly deserialized by the Node.js web terminal component as trusted session values, resulting in arbitrary command execution on systems with the web terminal feature enabled.