GitHub Advisoryadvisory · npm

GHSA-7mv8-j34q-vp7q @anthropic-ai/claude-code has Sed Command Validation Bypass that Allows Arbitrary File Writes

HIGH Published 2025-11-20 Modified 2025-11-21 Official page ↗
Aliases
CVE-2025-64755
Ecosystem
npm
Packages
@anthropic-ai/claude-code
Severity
High
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weaknesses
CWE-78
Reviewed
2025-11-20

Affected packages

• npm @anthropic-ai/claude-code: < 2.0.31 → fixed in 2.0.31

Description

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. Users on standard Claude Code auto-update will have received this fix automatically. Users performing manual updates are advised to update to the latest version. Thank you to Adam Chester - SpecterOps for reporting this issue!

Related

Alias · CVE (1)

Weakness · CWE (1)

  • CWE-78 Improper Neutralization of Special Elements used in an OS Command weakness

References