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TI-2025-34941 Aliases CVE-2025-55284GHSA-x5gv-jw7f-j6xj

Claude Code's Permissive Default Allowlist Enables Unauthorized File Read and Network Exfiltration in Claude Code

Priority LOW 32CWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-78.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00609 49th percentileScored 2026-11-07
Fix Fixed claude-code (anthropics): 1.0.4@anthropic-ai/claude-code (npm): 1.0.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
anthropicsclaude-codebefore 1.0.41.0.4Patch availableCNA
—@anthropic-ai/claude-code (npm)before 1.0.41.0.4Patch availableGHSA-x5gv-jw7f-j6xj
  • claude-code Vendoranthropics Affected before 1.0.4 Fixed in 1.0.4 Patch available CNA
  • @anthropic-ai/claude-code (npm) Vendor— Affected before 1.0.4 Fixed in 1.0.4 Patch available GHSA-x5gv-jw7f-j6xj

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:anthropic:claude_code:*:*:*:*:*:node.js:*:*before 1.0.4Vulnerableanthropics
  • cpe:2.3:a:anthropic:claude_code:*:*:*:*:*:node.js:*:* Versions before 1.0.4 Vulnerable ·anthropics

Remediation

  • Fix · CNA claude-code (anthropics) Fixed in 1.0.4
  • Fix · GHSA-x5gv-jw7f-j6xj @anthropic-ai/claude-code (npm) Fixed in 1.0.4 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-55284
  2. 2026-10-03 Alias added: GHSA-x5gv-jw7f-j6xj

References

Advisory 2

Other 1

  • TI-2025-40558 Claude Code Command Validation Bypass Allows Arbitrary Code Execution CVSS 4.0HIGH 8.7
  • TI-2025-36683 Claude Code vulnerable to arbitrary code execution caused by maliciously configured git email CVSS 4.0HIGH 8.7
  • TI-2025-37066 Claude Code's startup trust dialog could lead to Command Execution attack CVSS 4.0HIGH 8.7
  • TI-2026-17554 Claude Code Leaks Data via Malicious Environment Configuration Before Trust Confirmation CVSS 4.0MEDIUM 5.3
  • TI-2025-40093 @anthropic-ai/claude-code has Sed Command Validation Bypass that Allows Arbitrary File Writes CVSS 4.0HIGH 8.7
  • TI-2025-36422 Claude Code rg command had Command Injection that allowed bypass of user approval prompt for command execution CVSS 4.0HIGH 8.7
See all 25 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences