{"answers":{"affected":"2 open source packages ship an affected version, including @anthropic-ai/sandbox-runtime.","exploited":"There is no known exploitation of CVE-2025-66479 in the wild and no public exploit code.","fix":"Upgrade @anthropic-ai/sandbox-runtime to 0.0.16 or later.","what":"CVE-2025-66479 is a low-severity vulnerability in anthropic-experimental sandbox-runtime, published on 4 Dec 2025. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-66479 and fix it if it is affected.\n\nWhat it is: CVE-2025-66479 is a low-severity vulnerability in anthropic-experimental sandbox-runtime, published on 4 Dec 2025. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2025-66479 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- @anthropic-ai/sandbox-runtime (npm): affected all versions; fixed in 0.0.16\n- @anthropic-ai/sandbox-runtime (npm): affected all versions; fixed in 0.0.16\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2025-66479/ (Markdown: https://insights.sbomify.com/CVE-2025-66479/index.md)","id":"CVE-2025-66479","markdown":"https://insights.sbomify.com/CVE-2025-66479/index.md","name":"CVE-2025-66479","record":{"aliases":["GHSA-9gqj-5w7c-vx47"],"analysis":{"component_type":"developer_tool","fix_type":"patch","impacts":["security_bypass"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Sandboxing runtime tool","requires_auth":"high_privilege","summary":"Sandboxed code can bypass network restrictions if no allowed domains are configured, allowing unauthorized network access.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":1.8,"severity":"low","source":"cna","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","version":"4.0"},"cwes":[{"id":"CWE-693","name":"Protection Mechanism Failure"}],"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.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Anthropic Sandbox Runtime Incorrectly Implemented Network Sandboxing","id":"CVE-2025-66479","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"security_feature_bypass","year":"2025"},"n_packages":2,"n_references":2,"next":{"headline":"Wildfire has Arbitrary File Upload via Directory Traversal in UploadFileAction","id":"CVE-2025-66480"},"packages":[{"ecosystem":"npm","fixed":["0.0.16"],"introduced":["0"],"last_affected":[],"package":"@anthropic-ai/sandbox-runtime","purl":null,"source":"GHSA-9gqj-5w7c-vx47"},{"ecosystem":"npm","fixed":["0.0.16"],"introduced":["0"],"last_affected":[],"package":"@anthropic-ai/sandbox-runtime","purl":"pkg:npm/%40anthropic-ai/sandbox-runtime","source":"GHSA-9gqj-5w7c-vx47"}],"prev":{"headline":"Vim for Windows Uncontrolled Search Path Element Remote Code Execution Vulnerability","id":"CVE-2025-66476"},"products":["sandbox-runtime"],"published":"2025-12-04","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-12-05","vendors":["anthropic-experimental"]},"summary":"Sandboxed code can bypass network restrictions if no allowed domains are configured, allowing unauthorized network access.","url":"https://insights.sbomify.com/CVE-2025-66479/"}