PT-2026-6464 · Npm · @Anthropic-Ai/Claude-Code

Published 2026-02-03 · Updated 2026-02-03

OSV

CVSS v4.0

7.7

High

Base vector

AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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!

Fix

Path traversal

OS Command Injection

Weakness Enumeration

CWE-22

CWE-78

Related Identifiers

GHSA-Q728-GF8J-W49R

Affected Products

@Anthropic-Ai/Claude-Code

References · 4

• https://osv.dev/vulnerability/GHSA-q728-gf8j-w49r · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-24053 · Security Note
• https://github.com/anthropics/claude-code · Note
• https://github.com/anthropics/claude-code/security/advisories/GHSA-q728-gf8j-w49r · Note