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CVE-2026-43633— HestiaCP 1.9.0-1.9.4 Deserialization RCE via Web Terminal

Quick assessment

Affected
hestiacp hestiacp
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

HestiaCP是一个适用于现代网络的轻量级且功能强大的控制面板。 HestiaCP 1.9.0版本至1.9.4版本存在代码问题漏洞，该漏洞源于Web终端组件中存在反序列化，允许未经身份验证的远程攻击者实现root级代码执行。

CVSS 10.0 · Critical EPSS 1.49% · P73

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
hestiacp hestiacp 1.9.0≤ 1.9.4 affected
854d71b3c1737b0a0d0cc55c926008ffe1f6719b unaffected
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I. Basic Information for CVE-2026-43633

Vulnerability Information
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Vulnerability Title
HestiaCP 1.9.0-1.9.4 Deserialization RCE via Web Terminal
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
HestiaCP 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HestiaCP是一个适用于现代网络的轻量级且功能强大的控制面板。 HestiaCP 1.9.0版本至1.9.4版本存在代码问题漏洞，该漏洞源于Web终端组件中存在反序列化，允许未经身份验证的远程攻击者实现root级代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
hestiacp hestiacp 1.9.0 ~ 1.9.4 -

II. Public POCs for CVE-2026-43633

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 13095 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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Trigger conditions & impact
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Exploit chain & mitigation
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III. Intelligence Information for CVE-2026-43633

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Patches & Fixes for CVE-2026-43633 (2)

Security Blog Posts for CVE-2026-43633 (1)

Other References for CVE-2026-43633 (2)

IV. Related Vulnerabilities

Same product: hestiacp
Same vendor: hestiacp
Same weakness: CWE-502

V. Comments for CVE-2026-43633

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