CVE-2025-55284 — OS Command Injection in Claude-code

CWE-78 — OS Command Injection3 documents3 sources
Severity
7.1HIGHNVD
EPSS
0.0%
top 88.03%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Anthropics Claude-codeAnthropic Claude CodeAnthropic-ai Claude-code
Timeline
PublishedAug 16
Latest updateAug 18

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,…

CVSS vector

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

Affected Packages3 packages

▶CVEListV5anthropics/claude-code< 1.0.4

🔴Vulnerability Details

2
OSV
Claude Code's Permissive Default Allowlist Enables Unauthorized File Read and Network Exfiltration in Claude Code↗2025-08-18
▶
GHSA
Claude Code's Permissive Default Allowlist Enables Unauthorized File Read and Network Exfiltration in Claude Code↗2025-08-18
▶