CVE-2025-66479
Low
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.
SeverityLow
CVSS1.8
Exploit probability—
Product@anthropic-ai/sandbox-runtime
PublishedDec 4, 2025
First seenDec 4, 2025
Weakness typeCWE-693CWE-693
How to fix
Update
- @anthropic-ai/sandbox-runtime0.0.16 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| @anthropic-ai/sandbox-runtimenpm | v < 0.0.16 | 0.0.16 |
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