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CVE-2025-55284

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

Published: Aug 16, 2025Updated: Oct 24, 2025 Sources: CVE List NVD GHSACWE-78
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.4%
Top 65.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-78

Affected Products

claude codeanthropic
SaaS
AI / ML / llm-serving-inference
@anthropic-ai/claude-codenpmOSS Libraries
claude-codeanthropics
SaaS
AI / ML / llm-serving-inference
anthropiccommercialUSAI / MLaka claude
npmpackage-ecosystemOSS Libraries
anthropicscommercialUSAI / MLaka claude-code, anthropic-sdk-python, anthropic-sdk-typescript

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Execution
View detailed technique mapping

References

https://github.com/anthropics/claude-code/security/advisories/GHSA-x5gv-jw7f-j6xj
github.com
https://nvd.nist.gov/vuln/detail/CVE-2025-55284
nvd.nist.gov
https://github.com/anthropics/claude-code
github.com

Timeline

Published
Aug 16, 2025
Last Updated
Oct 24, 2025
News mentions
1

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