CVE-2025-66479
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-04

Last updated on: 2025-12-08

Assigner: GitHub, Inc.

Description
Anthropic Sandbox Runtime is a lightweight sandboxing tool for enforcing filesystem and network restrictions on arbitrary processes at the OS level, without requiring a container. Prior to 0.0.16, due to a bug in sandboxing logic, sandbox-runtime did not properly enforce a network sandbox if the sandbox policy did not configure any allowed domains. This could allow sandboxed code to make network requests outside of the sandbox. A patch for this was released in v0.0.16.
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Meta Information
Published
2025-12-04
Last Modified
2025-12-08
Generated
2026-06-16
AI Q&A
2025-12-04
EPSS Evaluated
2026-06-15
NVD
CVE-2025-66479
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
anthropic-ai sandbox-runtime 0.0.16
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-693 The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.
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Executive Summary

This vulnerability exists in Anthropic Sandbox Runtime versions prior to 0.0.16, where a bug in the sandboxing logic caused the network sandbox to not be properly enforced if the sandbox policy did not specify any allowed domains. As a result, sandboxed code could make network requests outside of the intended sandbox restrictions, potentially bypassing network controls.

Impact Analysis

This vulnerability could allow sandboxed processes to make unauthorized network requests outside of the sandbox restrictions, potentially leading to data leakage, unauthorized communication, or other security risks depending on the environment where the sandbox is used.

Mitigation Strategies

Update Anthropic Sandbox Runtime to version 0.0.16 or later, which includes a patch that properly enforces the network sandbox even if no allowed domains are configured in the sandbox policy.

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