{"id":"CVE-2026-54745","summary":"Kubeflow Pipelines: Unauthenticated SSRF and HTTP smuggling in Kubeflow Pipelines frontend /_proxy/ route, bypasses ENABLE_AUTHZ=true","details":"Kubeflow Pipelines enables users to build and deploy portable, scalable machine learning workflows. Prior to 2.17.0, the Kubeflow Pipelines frontend exposes an unauthenticated server-side request forgery vulnerability through the /_proxy/ route in frontend/server/proxy-middleware.ts. The _routePathWithReferer() function accepts an arbitrary attacker-controlled HTTP or HTTPS target and passes its origin to createProxyMiddleware without a host allowlist or filtering for loopback, link-local, RFC1918, or cluster-local addresses. The route remains outside the authorization middleware when ENABLE_AUTHZ=true and is reachable through /apis/v1beta1/_proxy/, /apis/v2beta1/_proxy/, /pipeline/apis/v1beta1/_proxy/, and /pipeline/apis/v2beta1/_proxy/, including through a crafted Referer header. Requests can forward attacker-controlled methods, headers such as Authorization, Cookie, and X-Forwarded-For, and POST bodies to reachable internal services, while returning the upstream response to the unauthenticated client. This can expose cloud metadata credentials, Kubernetes or service APIs, and other cluster-internal endpoints to unauthorized read or modification. This issue is fixed in version 2.17.0.","aliases":["GHSA-gqww-5pj5-8fq7"],"modified":"2026-08-30T03:46:49.263316762Z","published":"2026-08-28T15:59:01.118Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-284","CWE-918"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54745.json"},"references":[{"type":"WEB","url":"https://github.com/kubeflow/pipelines/releases/tag/2.17.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54745.json"},{"type":"ADVISORY","url":"https://github.com/kubeflow/pipelines/security/advisories/GHSA-gqww-5pj5-8fq7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54745"},{"type":"FIX","url":"https://github.com/kubeflow/pipelines/commit/a35f97aa4c17b25572369e5022546ab4421bdbdd"},{"type":"FIX","url":"https://github.com/kubeflow/pipelines/pull/13511"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/kubeflow/pipelines","events":[{"introduced":"0"},{"fixed":"a35f97aa4c17b25572369e5022546ab4421bdbdd"},{"fixed":"4a3592cb2dd0a91a4652ab93893ec8beda1f3158"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"2.17.0"}]}}],"versions":["master-55ec846","sdk-2.13.0","sdk-2.12.1","sdk-2.12.0","sdk-2.11.0","sdk-2.10.1","2.3.0","sdk-2.8.0","2.2.0","2.1.0","sdk-2.7.0","sdk-2.6.0","sdk-2.5.0","2.0.5","2.0.4","sdk-2.4.0","2.0.3","2.0.2","sdk-2.3.0","sdk-2.2.0","sdk-2.1.3","2.0.0","sdk-2.1.2","sdk-2.1.1","sdk-2.0.1","sdk-2.0.0","2.0.0-rc.2","sdk-2.0.0-rc.2","sdk-2.0.0-rc.1","2.0.0-rc.1","sdk-2.0.0b17","2.0.0-beta.2","sdk-2.0.0b16","sdk-2.0.0b15","2.0.0-beta.1","2.0.0-alpha.6","sdk-2.0.0b13","2.0.0-beta.0","sdk-2.0.0b11","sdk-2.0.0b10","sdk-2.0.0b9","sdk-2.0.0b8","sdk-2.0.0b7","sdk-2.0.0b5","2.0.0-alpha.5","2.0.0-alpha.4","sdk-2.0.0b3","sdk-2.0.0b1","2.0.0-alpha.3","2.0.0-alpha.2","2.0.0-alpha.1","2.0.0-alpha.0","1.8.0-alpha.0","1.7.0","1.7.0-rc.4","1.7.0-rc.3","1.7.0-rc.2","1.7.0-rc.1","1.7.0-rc.0","1.7.0-alpha.3","1.7.0-alpha.2","1.7.0-alpha.1","1.6.0","1.6.0-rc.0","1.5.0-rc.3","1.5.0-rc.2","1.5.0-rc.1","1.5.0-rc.0","0.5.1","1.4.0","1.4.0-rc.1","1.3.0","1.2.0","1.1.2","1.1.2-rc.1","1.1.1-beta.1","1.1.0-alpha.1","0.5.0","0.4.0","0.3.0","0.2.5","0.2.4","0.2.3","0.2.2","0.2.1","0.2.0","0.1.40","0.1.39","0.1.38","0.1.37","0.1.36","0.1.35","0.1.34","0.1.33","0.1.32","0.1.31","0.1.30","0.1.27","0.1.26","0.1.25","0.1.24","0.1.23","0.1.22","0.1.19","0.1.18","0.1.17","0.1.16","0.1.14","0.1.13","0.1.12","0.1.11","0.1.10","0.1.9","0.1.8","0.1.7","0.1.6","0.1.5","0.1.4","0.1.3","0.1.3-rc.3","0.1.3-rc.2","0.1.1","0.1.0","0.0.42"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54745.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"}]}