Paper/Archive/CVE-2026-26190

CVE-2026-26190

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

EPSS 39%public exploit CVSS 9.8

critical.is priorityof 100

CVSS 9.8 (CNA)9.8 / 10 × 3029.4 Not in CISA KEV+300.0 EPSS percentile 98.6.986 × 2019.7 Exploit: SSVC poc+1010.0 SSVC exploitation: poc+100.0

Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource

milvus< 2.5.27–CNA

milvus>= 2.6.0, < 2.6.10–CNA

Scores by source

GitHub_M (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

refgithub.com/milvus-io/milvus/security/advisories/GHSA-7ppg-37fh-vcr6 refgithub.com/milvus-io/milvus/commit/92b74dd2e286006a83b4a5f07951027b32e718a9 refgithub.com/milvus-io/milvus/releases/tag/v2.5.27 refgithub.com/milvus-io/milvus/releases/tag/v2.6.10