GitHub Advisoryadvisory · npm

GHSA-9gqj-5w7c-vx47 Anthropic Sandbox Runtime Incorrectly Implemented Network Sandboxing

LOW Published 2025-12-04 Modified 2025-12-04 Official page ↗
Aliases
CVE-2025-66479
Ecosystem
npm
Packages
@anthropic-ai/sandbox-runtime
Severity
Low
CVSS vector
CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Weaknesses
CWE-693
Reviewed
2025-12-04

Affected packages

• npm @anthropic-ai/sandbox-runtime: < 0.0.16 → fixed in 0.0.16

Description

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. Thank you to https://github.com/bendrucker for reporting this issue!

Related

Alias · CVE (1)

  • CVE-2025-66479 Anthropic Sandbox Runtime is a lightweight sandboxing tool for enforcing filesystem and network restrictions on arbitrary processes at the… vulnerability

Weakness · CWE (1)

  • CWE-693 Protection Mechanism Failure weakness

References