CVEs / CVE-2026-26190
CVE-2026-26190: milvus-io milvus vulnerability
- critical 9.8 CVSS 3.1 (from the CNA)
- EPSS 39.2% chance of exploitation in the next 30 days, higher than 98% of CVEs (30 Oct 2026)
- Last changed at its sources
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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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| milvus-io milvus | < 2.5.27 | — |
| milvus-io milvus | >= 2.6.0, < 2.6.10 | — |
| Product | Affected | Fixed in |
|---|---|---|
| github.com/milvus-io/milvus (Go) | before 2.5.27 | 2.5.27 |
| github.com/milvus-io/milvus (Go) | from 2.6.0, before 2.6.10 | 2.6.10 |
Package versions from GHSA-7ppg-37fh-vcr6.
Exploitation
Not in the CISA Known Exploited Vulnerabilities catalog as of 30 Oct 2026.
Severity
| CVSS 3.1 | 9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-306 |
References
- CVE-2026-26190 on NVD
- CVE-2026-26190 on OSV
- https://github.com/milvus-io/milvus/commit/92b74dd2e286006a83b4a5f07951027b32e718a9 Patch
- https://github.com/milvus-io/milvus/releases/tag/v2.5.27 Product, Release Notes
- https://github.com/milvus-io/milvus/releases/tag/v2.6.10 Product, Release Notes
- https://github.com/milvus-io/milvus/security/advisories/GHSA-7ppg-37fh-vcr6 Exploit, Mitigation, Vendor Advisory
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.