Auth bypass in Milvus
CVE-2026-26190
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 de…
Vulnerability class: Broken Authentication
EPSS: 0.343 (98.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Milvus
- Milvus-io Milvus — versions < 2.5.27, >= 2.6.0, < 2.6.10
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-26190?
- CVE-2026-26190 is a critical-severity vulnerability in Milvus, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2026-02-13.
- How severe is CVE-2026-26190?
- Critical severity. CVSS v3 base score is 9.8 out of 10.