{"cve":"CVE-2025-66479","nvd":{"published":"2025-12-04T21:16:09.393","modified":"2026-10-18T15:10:00.097","status":"Deferred","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.","cvss_v4":{"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","score":1.8},"cvss_v3":null,"cwes":["CWE-693"],"references":["https://github.com/anthropic-experimental/sandbox-runtime/commit/bea2930cc1db9c73a1b15acf6dc19c5261aec1f3","https://github.com/anthropic-experimental/sandbox-runtime/security/advisories/GHSA-9gqj-5w7c-vx47"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:16:40.427100871+00:00"},"epss":{"cve":"CVE-2025-66479","score":0.00163,"percentile":0.05486,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-9gqj-5w7c-vx47","url":"https://osv.dev/vulnerability/GHSA-9gqj-5w7c-vx47","summary":"Anthropic Sandbox Runtime Incorrectly Implemented Network Sandboxing ","modified":"2025-12-05T12:42:56.950316Z","packages":[{"ecosystem":"npm","name":"@anthropic-ai/sandbox-runtime","purl":"pkg:npm/%40anthropic-ai/sandbox-runtime","ranges":["<0.0.16"],"fixed":["0.0.16"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}