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CVE-2025-55284— Claude Code's Permissive Default Allowlist Enables Unauthorized File Read and Network Exfiltration in Claude Code

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开源的一个代理编码工具。 Claude Code 1.0.4之前版本存在操作系统命令注入漏洞，该漏洞源于安全命令允许列表过于宽泛，可能导致未经确认的文件读取和网络传输。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.60% · P48
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I. Basic Information for CVE-2025-55284

Vulnerability Information
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Vulnerability Title
Claude Code's Permissive Default Allowlist Enables Unauthorized File Read and Network Exfiltration in Claude Code
Source: CVE Program / CVE List V5
Vulnerability Description
Claude Code is an agentic coding tool. Prior to version 1.0.4, it's possible to bypass the Claude Code confirmation prompts to read a file and then send file contents over the network without user confirmation due to an overly broad allowlist of safe commands. Reliably exploiting this requires the ability to add untrusted content into a Claude Code context window. Users on standard Claude Code auto-update received this fix automatically after release. Current users of Claude Code are unaffected, as versions prior to 1.0.24 are deprecated and have been forced to update.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Claude Code 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Claude Code是Anthropic开源的一个代理编码工具。 Claude Code 1.0.4之前版本存在操作系统命令注入漏洞，该漏洞源于安全命令允许列表过于宽泛，可能导致未经确认的文件读取和网络传输。
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 < 1.0.4 -

II. Public POCs for CVE-2025-55284

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III. Intelligence Information for CVE-2025-55284

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Vendor Advisories for CVE-2025-55284 (1)

IV. Related Vulnerabilities

Same product: claude-code
Same vendor: anthropics
Same weakness: CWE-78