Critical severity · published Dec 3, 2025
CVE-2025-66032
Claude Code Command Validation Bypass Allows Arbitrary Code Execution
9.8
CVSS
0.7%
EPSS
No
On KEV
Description
Claude Code is an agentic coding tool. Prior to 1.0.93, Due to errors in parsing shell commands related to $IFS and short CLI flags, it was possible to bypass the Claude Code read-only validation and trigger arbitrary code execution. Reliably exploiting this requires the ability to add untrusted content into a Claude Code context window. This vulnerability is fixed in 1.0.93.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 53% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CL
claude-code · anthropics
< 1.0.93 · source: vendor
CC
Claude Code · Anthropic
before 1.0.93 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-66032
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-66032
Vendor Advisory
https://github.com/anthropics/claude-code/security/advisories/GHSA-xq4m-mc3c-vvg3
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