CVE-2026-26190

Summary

Milvus is an open-source vector database built for generative AI applications. Prior to 2.5.27 and 2.6.10, Milvus exposes TCP port 9091 by default, which enables authentication bypasses. The /expr debug endpoint uses a weak, predictable default authentication token derived from etcd.rootPath (default: by-dev), enabling arbitrary expression evaluation. The full REST API (/api/v1/*) is registered on the metrics/management port without any authentication, allowing unauthenticated access to all business operations including data manipulation and credential management. This vulnerability is fixed in 2.5.27 and 2.6.10.

Impact & exploitability

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products we track (1)

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://github.com/milvus-io/milvus/commit/92b74dd2e286006a83b4a5f07951027b32e718a9 ↗

Additional information

• NVD record
• https://github.com/milvus-io/milvus/commit/92b74dd2e286006a83b4a5f07951027b32e718a9Patch
• https://github.com/milvus-io/milvus/security/advisories/GHSA-7ppg-37fh-vcr6Advisory
• https://github.com/milvus-io/milvus/releases/tag/v2.5.27
• https://github.com/milvus-io/milvus/releases/tag/v2.6.10