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CVE-2026-43634— HestiaCP 1.2.0-1.9.4 IP Spoofing via CF-Connecting-IP Header

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Hestia Control Panel开源的一个适用于现代网络的轻量级且功能强大的控制面板。 HestiaCP 1.2.0版本至1.9.4版本存在安全漏洞，该漏洞源于IP欺骗漏洞，允许未经身份验证的远程攻击者通过提供任意IP地址绕过身份验证安全控制。

CVSS 7.5 · High EPSS 0.36% · P28

Affected Version Matrix 2

VendorProduct Version RangeStatus
hestiacp hestiacp 1.2.0≤ 1.9.4 affected
f381e294500f671cf12716c638afd0bfde901f88 unaffected
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I. Basic Information for CVE-2026-43634

Vulnerability Information
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Vulnerability Title
HestiaCP 1.2.0-1.9.4 IP Spoofing via CF-Connecting-IP Header
Source: CVE Program / CVE List V5
Vulnerability Description
HestiaCP versions 1.2.0 through 1.9.4 contain an IP spoofing vulnerability that allows unauthenticated remote attackers to bypass authentication security controls by supplying an arbitrary IP address in the CF-Connecting-IP HTTP header without verifying the request originated from Cloudflare's network. Attackers can exploit this to circumvent fail2ban brute-force protection, bypass per-user IP allowlists, and poison authentication audit logs by spoofing trusted IP addresses on each request.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用不可信的源
Source: CVE Program / CVE List V5
Vulnerability Title
HestiaCP 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HestiaCP是Hestia Control Panel开源的一个适用于现代网络的轻量级且功能强大的控制面板。 HestiaCP 1.2.0版本至1.9.4版本存在安全漏洞，该漏洞源于IP欺骗漏洞，允许未经身份验证的远程攻击者通过提供任意IP地址绕过身份验证安全控制。
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 1.2.0 ~ 1.9.4 -

II. Public POCs for CVE-2026-43634

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 10019 chars
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POC zip download
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III. Intelligence Information for CVE-2026-43634

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Patches & Fixes for CVE-2026-43634 (2)

Vendor Advisories for CVE-2026-43634 (1)

Security Blog Posts for CVE-2026-43634 (1)

Other References for CVE-2026-43634 (1)

IV. Related Vulnerabilities

Same product: hestiacp
Same vendor: hestiacp
Same weakness: CWE-348

V. Comments for CVE-2026-43634

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