Relative path traversal during model archive extraction in Amazon Web Services Multi Model Server

Summary

Relative path traversal during model archive extraction in Amazon Web Services Multi Model Server 1.1.11 and earlier might allow remote actors to execute arbitrary code via a crafted model archive. Multi Model Server is end of life and no fixed version is available. Users should discontinue use of Multi Model Server and migrate to a supported model serving solution.

Remediation

1. Inventory every AWS multi-model-server deployment, including staging.
2. No fixed version appears in the public sources yet. Check the references below and the vendor directly.

References

• Advisoryhttps://aws.amazon.com/security/security-bulletins/2026-148-aws/