Auth bypass in Milvus-io 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: 0.005 (66.3th 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-io Milvus — versions < 2.5.27, >= 2.6.0, < 2.6.10
Weakness classification (CWE)
References
- https://github.com/milvus-io/milvus/security/advisories/GHSA-7ppg-37fh-vcr6 (x_refsource_CONFIRM)
- https://github.com/milvus-io/milvus/commit/92b74dd2e286006a83b4a5f07951027b32e718a9 (x_refsource_MISC)
- https://github.com/milvus-io/milvus/releases/tag/v2.5.27 (x_refsource_MISC)
- https://github.com/milvus-io/milvus/releases/tag/v2.6.10 (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-26190?
- CVE-2026-26190 is a critical-severity vulnerability in Milvus-io 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.