CRITICAL

CVE-2026-26190

Milvus Allows Unauthenticated Access to Restful API on Metrics Port (9091) Leads to Critical System Compromise

CVSS v3

9.8

CRITICAL

EPSS Score

4.0 %

exploit probability, as of 2026-09-25

CISA KEV

known exploited

Exploitation

poc

SSVC status

Description

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 busi

Technical details

Published: 2026-02-13
Last Modified: 2026-02-18

Frequently asked questions

What is CVE-2026-26190?

Is CVE-2026-26190 actively exploited?

A proof-of-concept exploit exists for CVE-2026-26190, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-26190?

CVE-2026-26190 has a CVSS v3 base score of 9.8 (CRITICAL severity).

Is CVE-2026-26190 affecting your environment?

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