CVE-2025-55284

HIGH

Claude Code < 1.0.4 - OS Command Injection via Confirmation Prompt Bypass

Title source: llm
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 7.5
EPSS 0.0043
EPSS Percentile 34.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-78
Status published
Products (2)
anthropic/claude_code < 1.0.4
anthropic-ai/claude-code 0 - 1.0.4npm
Published Aug 16, 2025
Tracked Since Feb 18, 2026