Medium severity · published Feb 6, 2026
CVE-2026-25723
Claude Code Vulnerable to Command Injection via Piped sed Command Bypasses File Write Restrictions
6.5
CVSS
0.4%
EPSS
No
On KEV
Description
Claude Code is an agentic coding tool. Prior to version 2.0.55, Claude Code failed to properly validate commands using piped sed operations with the echo command, allowing attackers to bypass file write restrictions. This vulnerability enabled writing to sensitive directories like the .claude folder and paths outside the project scope. Exploiting this required the ability to execute commands through Claude Code with the "accept edits" feature enabled. This issue has been patched in version 2.0.55.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CL
claude-code · anthropics
< 2.0.55 · source: vendor
CC
Claude Code · Anthropic
before 2.0.55 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-25723
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-25723
Vendor Advisory
https://github.com/anthropics/claude-code/security/advisories/GHSA-mhg7-666j-cqg4
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