---
id: CVE-2026-54745
title: >-
  Kubeflow Pipelines enables users to build and deploy portable, scalable
  machine learning workflows
summary: >-
  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…
severity: critical
cvss: 10
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-284
  - CWE-918
published: '2026-08-28'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:09:13.080'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-54745'
references:
  - url: >-
      https://github.com/kubeflow/pipelines/commit/a35f97aa4c17b25572369e5022546ab4421bdbdd
    label: security-advisories@github.com
  - url: 'https://github.com/kubeflow/pipelines/pull/13511'
    label: security-advisories@github.com
  - url: 'https://github.com/kubeflow/pipelines/releases/tag/2.17.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/kubeflow/pipelines/security/advisories/GHSA-gqww-5pj5-8fq7
    label: security-advisories@github.com
  - url: >-
      https://github.com/kubeflow/pipelines/security/advisories/GHSA-gqww-5pj5-8fq7
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00621
epssPercentile: 0.47465
ingestedAt: '2026-09-09T21:22:45.558Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.