CVE-2025-66479
Anthropic Sandbox Runtime Incorrectly Implemented Network Sandboxing
EPSS 0.04%
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!
How to fix CVE-2025-66479
To remediate CVE-2025-66479, upgrade the affected package to a fixed version below.
- npm/@anthropic-ai/sandbox-runtime—upgrade to 0.0.16 or later
Is CVE-2025-66479 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 0.0.16
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | 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 |