CVE-2025-64755
BaseFortify
Publication date: 2025-11-21
Last updated on: 2025-12-04
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| anthropic | claude_code | to 2.0.31 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-78 | The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability in Claude Code, prior to version 2.0.31, is due to an error in sed command parsing that allowed attackers to bypass the read-only validation mechanism. As a result, it was possible to write to arbitrary files on the host system, which should have been protected from modification.
How can this vulnerability impact me? :
The vulnerability can allow an attacker to modify arbitrary files on the host system without proper authorization. This can lead to unauthorized changes, potential system compromise, data corruption, or the introduction of malicious code, thereby impacting system integrity and security.
What immediate steps should I take to mitigate this vulnerability?
Upgrade Claude Code to version 2.0.31 or later, as this version contains the patch that fixes the sed command parsing error allowing arbitrary file writes.