CVE-2026-26190CRITICAL 9.8EPSS p97.8%

CVE-2026-26190CVE-2026-26190

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 business operations including data manipulation and credential management. This vulnerability is fixed in 2.5.27 and 2.6.10.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS27.66% probability of exploitation · percentile 97.8% · 2026-06-18T12:00:27Z
Published2026-02-13
Last modified2026-02-18

Underlying weaknesses· 1

CWE-306

References

  1. https://github.com/milvus-io/milvus/commit/92b74dd2e286006a83b4a5f07951027b32e718a9
  2. https://github.com/milvus-io/milvus/releases/tag/v2.5.27
  3. https://github.com/milvus-io/milvus/releases/tag/v2.6.10
  4. https://github.com/milvus-io/milvus/security/advisories/GHSA-7ppg-37fh-vcr6

1

TypeTargetConfidenceTier
WeaknessMissing Authentication for Critical Functioncwe-3060%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.