GitHub Advisoryadvisory · npm

GHSA-q728-gf8j-w49r Claude Code has a Path Restriction Bypass via ZSH Clobber which Allows Arbitrary File Writes

HIGH Published 2026-02-03 Modified 2026-02-04 Official page ↗
Aliases
CVE-2026-24053
Ecosystem
npm
Packages
@anthropic-ai/claude-code
Severity
High
CVSS vector
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
Weaknesses
CWE-22, CWE-78
Reviewed
2026-02-03

Affected packages

• npm @anthropic-ai/claude-code: < 2.0.74 → fixed in 2.0.74

Description

Due to a Bash command validation flaw in parsing ZSH clobber syntax, it was possible to bypass directory restrictions and write files outside the current working directory without user permission prompts. Exploiting this required the user to use ZSH and the ability to add untrusted content into a Claude Code context window. Users on standard Claude Code auto-update have received this fix already. Users performing manual updates are advised to update to the latest version. Claude Code thanks https://hackerone.com/alexbernier for reporting this issue!

Related

Alias · CVE (1)

Weakness · CWE (2)

  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command weakness

References