{"id":"CVE-2026-26190","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-26190","generatedAt":"2026-10-28T08:27:53.199Z","title":"Prior to 2.5.27 and 2.6.10, Milvus exposes TCP port 9091 by default, which enables authentication bypasses.","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.","published":"2026-02-13T19:17:29.000Z","lastModified":"2026-06-17T10:25:55.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-306"],"affected":["milvus/milvus"],"epss":{"score":0.39255,"percentile":0.98596,"date":"2026-10-27","history":[{"date":"2026-09-24","score":0.0405,"percentile":0.90253},{"date":"2026-10-25","score":0.39255,"percentile":0.98592}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 39.3%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-10-25T00:00:00.000Z","detail":{"to":0.39255,"from":0.0456,"percentile":0.98592},"summary":"EPSS moved from 4.6% to 39.3% probability of exploitation in the next thirty days."},{"kind":"epss","label":"EPSS jump","at":"2026-09-24T00:00:00.000Z","detail":{"to":0.0405,"from":0.36912,"percentile":0.90253},"summary":"EPSS moved from 36.9% to 4.0% probability of exploitation in the next thirty days."}],"references":[{"url":"https://github.com/milvus-io/milvus/commit/92b74dd2e286006a83b4a5f07951027b32e718a9","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/milvus-io/milvus/releases/tag/v2.5.27","tags":["Product","Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/milvus-io/milvus/releases/tag/v2.6.10","tags":["Product","Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/milvus-io/milvus/security/advisories/GHSA-7ppg-37fh-vcr6","tags":["Exploit","Mitigation","Vendor Advisory"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-26190","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}