CVE-2025-55284
HIGHClaude Code < 1.0.4 - OS Command Injection via Confirmation Prompt Bypass
Title source: llmDescription
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
Vendor Advisory x_refsource_confirm
https://github.com/anthropics/claude-code/security/advisories/GHSA-x5gv-jw7f-j6xj
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