9.8

CVE-2026-26190: Milvus Allows Unauthenticated Access to Restful API on Metrics Port (9091) Leads to Critical System Compromise

Analyzed
AliasesGHSA-7ppg-37fh-vcr6BIT-milvus-2026-26190GO-2026-4481
Published 13-02-2026Last modified 26-02-2026

Vulnerability summary

CVE-2026-26190 is a critical (CVSS 9.8) vulnerability in milvus-io milvus. EPSS estimates a 39.26% chance of exploitation in the next 30 days, higher than 98.6% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Prioritisepublic exploit

Public exploit (GitHub, Date unknown)

Source freshness unavailable

How is this decided?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
39.26%
0%100%
High · +35.12 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
OPENSUSE-SU-2026:21483-1SUSE-SU-2026:0757-1

Timeline

  1. 13-02-2026
    PublishedVulnerability first disclosed.
  2. 26-02-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

39.26%

Chance of exploitation in the next 30 days

Percentile

99%

Versus all other CVEs

30-day change

Increase +35.12 pp

From 4.14% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • githubUnverified

    Milvus

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Github.com/milvus-io1 product
  • milvus< 2.5.27 | ≥ 2.6.0, < 2.6.10 | All versions (No fix recorded)
Milvus1 product
  • milvus< 2.5.27 | ≥ 2.6.0, < 2.6.10
Milvus-io1 product
  • milvus< 2.5.27 | ≥ 2.6.0, < 2.6.10

3 vendors · 3 products

References

5 links