Vulnerability Report

CVE-2026-25722

Title: Write protection bypass in Claude Code via directory changes

Input Validation Error

Proof Of Concept

No public PoC currently indexed for CVE-2026-25722.

CWE Category CWE-20

Published Date Feb 06, 2026

Modified Date Feb 09, 2026

Exploit Status Not Found

Score 7.7 CVSS v4.0

Exploit Probability (EPSS)

0.36%

Vulnerability Summary

CVE-2026-25722: Claude Code is an agentic coding tool. Prior to version 2.0.57, Claude Code failed to properly validate directory changes when combined with write operations to protected folders. By using the cd command to navigate into sensitive directories like .claude, it was possible to bypass write protection and create or modify files without user confirmation. Reliably exploiting this required the ability to add untrusted content into a Claude Code context window. This issue has been patched in version 2.0.57.

Impacted Vendors

anthropic 1

Reference Links

https://github.com/anthropics/claude-code/security/advisories/GHSA-66q4-vfjg-2qhh

CVSS v4.0

Source Entity [email protected]

Severity HIGH

7.7

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

PASSIVE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

N/A

RAW 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

Source Entity [email protected]

Severity CRITICAL

9.1

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns