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TI-2026-21181 Aliases CVE-2026-26190GHSA-7ppg-37fh-vcr6

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

Priority HIGH 82CWE-306Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-306.

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.39255 98th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed milvus (milvus-io): 2.5.27, 2.6.10github.com/milvus-io/milvus (Go): 2.5.27, 2.6.10

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
milvus-iomilvusbefore 2.5.27; 2.6.0 to before 2.6.102.5.27, 2.6.10Patch availableCNA
—github.com/milvus-io/milvus (Go)before 2.5.272.5.27Patch availableGHSA-7ppg-37fh-vcr6
—github.com/milvus-io/milvus (Go)2.6.0 to before 2.6.102.6.10Patch availableGHSA-7ppg-37fh-vcr6
  • milvus Vendormilvus-io Affected before 2.5.27; 2.6.0 to before 2.6.10 Fixed in 2.5.27, 2.6.10 Patch available CNA
  • github.com/milvus-io/milvus (Go) Vendor— Affected before 2.5.27 Fixed in 2.5.27 Patch available GHSA-7ppg-37fh-vcr6
  • github.com/milvus-io/milvus (Go) Vendor— Affected 2.6.0 to before 2.6.10 Fixed in 2.6.10 Patch available GHSA-7ppg-37fh-vcr6

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:milvus:milvus:*:*:*:*:*:*:*:*before 2.5.27; 2.6.0 to before 2.6.10VulnerableMilvus
  • cpe:2.3:a:milvus:milvus:*:*:*:*:*:*:*:* Versions before 2.5.27; 2.6.0 to before 2.6.10 Vulnerable ·Milvus

Remediation

  • Fix · CNA milvus (milvus-io) Fixed in 2.5.27, 2.6.10
  • Fix · GHSA-7ppg-37fh-vcr6 github.com/milvus-io/milvus (Go) Fixed in 2.5.27 Advisory →
  • Fix · GHSA-7ppg-37fh-vcr6 github.com/milvus-io/milvus (Go) Fixed in 2.6.10 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-26190
  2. 2026-10-03 Alias added: GHSA-7ppg-37fh-vcr6
  3. 2026-10-25 EPSS moved to the 95th–99th percentile

References

Exploit 1

Patch 1

Other 3

  • TI-2026-48516 Milvus 2.6.22, 3.0.0 Unauthenticated Denial of Service via /management/stop CVSS 4.0HIGH 8.7
  • TI-2025-39904 Milvus Proxy has Critical Authentication Bypass Vulnerability CVSS 4.0CRITICAL 9.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences