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CVE

CVE-2026-25722

Claude Code Vulnerable to Command Injection via Directory Change Bypasses Write Protection
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CVE

CVE-2026-25722

Claude Code Vulnerable to Command Injection via Directory Change Bypasses Write Protection

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. 

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

About

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

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
7.7
-
4.0
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
C
H
U
0
-
C
H
U
8.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Related Resources

No items found.

References

https://github.com/anthropics/claude-code/security/advisories/GHSA-66q4-vfjg-2qhh, https://nvd.nist.gov/vuln/detail/CVE-2026-25722, https://github.com/anthropics/claude-code

Severity

8.8

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
8.8
EPSS Probability
0.00162%
EPSS Percentile
0.36973%
Introduced Version
0,0.2.9
Fix Available
2.0.57

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