Security readout for executives and security teams
Plain-English summary
Milvus versions before 2.5.27 and 2.6.10 can expose powerful management and REST functions without authentication on port 9091. An unauthenticated network user could manipulate data, manage credentials, and compromise confidentiality, integrity, and availability. This is critical for any internet-exposed or broadly reachable Milvus deployment.
Executive priority
Prioritize within the next emergency patch cycle for any reachable Milvus deployment. This affects AI/vector database infrastructure and can enable unauthenticated data manipulation and credential management. Internet-exposed systems should be treated as urgent.
Technical view
CVE-2026-26190 is a CWE-306 missing-authentication flaw in Milvus. The metrics/management port 9091 exposes /api/v1/* without authentication, and the /expr debug endpoint uses a predictable default token derived from etcd.rootPath. Affected versions are <2.5.27 and >=2.6.0,<2.6.10. CVSS is 9.8.
Likely exposure
Exposure is likely where Milvus port 9091 is reachable from untrusted networks, shared internal networks, or application environments. Default exposure is noted in the advisory description. Risk is lower if the port is strictly isolated and only trusted administrative components can reach it.
Exploitation context
No CISA KEV listing or cited source in the bundle confirms active exploitation. However, the issue is network-accessible, requires no credentials, and affects sensitive business operations. Treat reachable vulnerable instances as high-priority because abuse could directly affect data and credentials.
Researcher notes
The strongest source is the GitHub security advisory, supported by release tags and a fixing commit. Evidence identifies affected version ranges and fixed versions. Public sources provided do not establish exploitation in the wild. Avoid assuming impact beyond Milvus deployments matching the listed versions and exposure conditions.
Mitigation direction
- Upgrade Milvus to 2.5.27 or 2.6.10, depending on your release branch.
- Restrict network access to port 9091 to trusted administrative paths only.
- Review vendor advisory and release notes before deploying updates.
- Audit exposed Milvus services for unintended management-port reachability.
- Rotate credentials if unauthorized access to vulnerable port 9091 is suspected.
Validation and detection
- Inventory Milvus deployments and record exact versions.
- Confirm no deployment runs <2.5.27 or >=2.6.0,<2.6.10.
- Verify port 9091 is not reachable from untrusted networks.
- Review access logs around the metrics or management interface.
- Confirm upgrade completion using approved asset and package records.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-306: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupDatabase behavior lookup
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-26190 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/milvus-io/milvus/security/advisories/GHSA-7ppg-37fh-vcr6CVE reference · x_refsource_CONFIRM
- https://github.com/milvus-io/milvus/commit/92b74dd2e286006a83b4a5f07951027b32e718a9CVE reference · x_refsource_MISC
- https://github.com/milvus-io/milvus/releases/tag/v2.5.27CVE reference · x_refsource_MISC
- https://github.com/milvus-io/milvus/releases/tag/v2.6.10CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Missing Authentication for Critical Function
Missing Authentication for Critical Function represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.