CVSS 3.1
9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2026-26190
Critical (9.8) in milvus milvus. EPSS 39% chance of exploitation in the next 30 days. Fixed in github.com/milvus-io/milvus 2.5.27, 2.6.10.
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.
Severity
- EPSS
- 39% chance of exploitation in the next 30 days; higher than 98% of CVEs (scores of 2026-10-31)
- CWE
- CWE-306
- Published
- Modified
- Record from
- the NVD, synced
Affected
- milvus:milvus
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-7ppg-37fh-vcr6 | Go | github.com/milvus-io/milvus | <2.5.27 | 2.5.27 |
| GHSA-7ppg-37fh-vcr6 | Go | github.com/milvus-io/milvus | >=2.6.0 <2.6.10 | 2.6.10 |
| GO-2026-4481 | Go | github.com/milvus-io/milvus | all versions | no fix published |