CVE-2025-66479 Details
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.
A vulnerability in Anthropic Sandbox Runtime versions prior to 0.0.16 allows sandboxed code to make network requests outside of the intended restrictions. This issue arises from a flaw in the sandboxing logic, where an empty allowed domains configuration was interpreted as permitting all network access. The vulnerability could be exploited by any code running in the sandbox that attempts to make network requests. The problem has been addressed in version 0.0.16.
Users can upgrade to Anthropic Sandbox Runtime version 0.0.16 or later to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Dec 4, 2025CISA-ADP
Assessed Dec 5, 2025References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-693 | Protection Mechanism Failure | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Anthropic Sandbox Runtime | All versions |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Dec 4, 2025 | New CVE Received | [email protected] |