Critical severity · published Nov 21, 2025
CVE-2025-64755
@anthropic-ai/claude-code has Sed Command Validation Bypass that Allows Arbitrary File Writes
9.8
CVSS
0.6%
EPSS
No
On KEV
Description
Claude Code is an agentic coding tool. Prior to version 2.0.31, due to an error in sed command parsing, it was possible to bypass the Claude Code read-only validation and write to arbitrary files on the host system. This issue has been patched in version 2.0.31.
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)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CL
claude-code · anthropics
< 2.0.31 · source: vendor
CC
Claude Code · Anthropic
before 2.0.31 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-64755
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-64755
Vendor Advisory
https://github.com/anthropics/claude-code/security/advisories/GHSA-7mv8-j34q-vp7q
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