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CVE-2026-44467— Claude Desktop: SSH Host Key Verification Bypass Allows Man-in-the-Middle Attack on Remote Sessions

Quick assessment

Affected
anthropics claude-code
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Claude Code是Anthropic开源的一个终端原生AI编程工具。 Claude Code 1.2581.0至1.4304.0之前版本存在安全漏洞，该漏洞源于SSH远程开发功能仅验证主机名是否存在于known_hosts文件中而未比较服务器呈现的主机密钥，可能导致网络位置的攻击者呈现任意SSH主机密钥并静默接受连接，从而对远程开发会话进行中间人攻击。

AI Predicted 8.1 Difficulty: Moderate EPSS 0.22% · P11

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
anthropics claude-code >= 1.2581.0, < 1.4304.0 affected
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I. Basic Information for CVE-2026-44467

Vulnerability Information
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Vulnerability Title
Claude Desktop: SSH Host Key Verification Bypass Allows Man-in-the-Middle Attack on Remote Sessions
Source: CVE Program / CVE List V5
Vulnerability Description
The Claude Desktop app gives you Claude Code with a graphical interface built for running multiple sessions side by side. From 1.2581.0 to before 1.4304.0, Claude Desktop's SSH remote development feature verified only whether a hostname existed in ~/.ssh/known_hosts without comparing the server's presented host key against the stored key. This allowed a network-positioned attacker to present an arbitrary SSH host key and have the connection silently accepted, enabling a man-in-the-middle attack on remote development sessions. Successful exploitation required the attacker to be in a network position to intercept SSH traffic (e.g., via ARP spoofing, rogue Wi-Fi, or DNS poisoning) and the target hostname to already have an entry in the victim's known_hosts file. This vulnerability is fixed in 1.4304.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对宿主不匹配的证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Claude Code 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Claude Code是Anthropic开源的一个终端原生AI编程工具。 Claude Code 1.2581.0至1.4304.0之前版本存在安全漏洞，该漏洞源于SSH远程开发功能仅验证主机名是否存在于known_hosts文件中而未比较服务器呈现的主机密钥，可能导致网络位置的攻击者呈现任意SSH主机密钥并静默接受连接，从而对远程开发会话进行中间人攻击。
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
anthropics claude-code >= 1.2581.0, < 1.4304.0 -

II. Public POCs for CVE-2026-44467

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III. Intelligence Information for CVE-2026-44467

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Vendor Advisories for CVE-2026-44467 (1)

IV. Related Vulnerabilities

Same product: claude-code
Same vendor: anthropics
Same weakness: CWE-297

V. Comments for CVE-2026-44467

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