AnthropicGHSA-9gqj-5w7c-vx47
Network Sandboxing Escape
Low1.8CVE-2025-66479 · Published Dec 4, 2025
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!
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| @anthropic-ai/sandbox-runtime npm | < 0.0.16 | 0.0.16 |
Details and references
- CVSS 4.0
- 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
- Severity from
- GitHub (reviewed advisory)
More Anthropic advisories
All Anthropic| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Feb 3 | Path Restriction Bypass via ZSH Clobber Allows Arbitrary File Writes | High7.7 | v2.0.74 |
| Feb 3 | Domain Validation Bypass Allows Automatic Requests to Attacker-Controlled Domains | High7.1 | v1.0.111 |
| Jan 20 | Anthropic: information disclosure | Medium5.3 | v2.0.65 |
| Dec 32025 | Command Validation Bypass Allows Arbitrary Code Execution | High8.7 | v1.0.93 |
| Nov 202025 | Sed Command Validation Bypass Allows Arbitrary File Writes | High8.7 | v2.0.31 |
| Nov 192025 | Command execution prior to Claude Code startup trust dialog | High7.7 | v1.0.39 |