CVE-2026-25723: high-severity vulnerability in anthropics claude-code
Claude Code Vulnerable to Command Injection via Piped sed Command Bypasses File Write Restrictions
Published
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.7epss 0.4%
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:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
anthropics · claude-codeRelated CVEs — anthropics claude-code
In the same product, most dangerous first.
CVE-2026-21852MEDIUMClaude Code Leaks Data via Malicious Environment Configuration Before Trust ConfirmationEPSS 27.5%CVE-2025-59536HIGHClaude Code's startup trust dialog could lead to Command Execution attackEPSS 24.9%CVE-2025-54794HIGHClaude Code Research Preview has a Path Restriction Bypass which could allow unauthorized file accessEPSS 1.5%CVE-2025-54795HIGHClaude Code echo command allowed bypass of user approval prompt for command executionEPSS 1.1%CVE-2025-66032HIGHClaude Code Command Validation Bypass Allows Arbitrary Code ExecutionEPSS 0.7%CVE-2026-39861HIGHClaude Code: Sandbox Escape via Symlink Following Allows Arbitrary File Write Outside WorkspaceEPSS 0.7%