PT-2026-6862 · Npm · @Anthropic-Ai/Claude-Code

Published 2026-02-06 · Updated 2026-02-06

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

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.

Users on standard Claude Code auto-update received this fix automatically. Users performing manual updates are advised to update to the latest version.

Claude Code thanks hackerone.com/nil221 for reporting this issue!

Fix

OS Command Injection

RCE

Weakness Enumeration

CWE-78

CWE-20

Related Identifiers

GHSA-MHG7-666J-CQG4

Affected Products

@Anthropic-Ai/Claude-Code

References · 4

• https://osv.dev/vulnerability/GHSA-mhg7-666j-cqg4 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-25723 · Security Note
• https://github.com/anthropics/claude-code · Note
• https://github.com/anthropics/claude-code/security/advisories/GHSA-mhg7-666j-cqg4 · Note