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CVE-2026-54745— Kubeflow Pipelines: Unauthenticated SSRF and HTTP smuggling in Kubeflow Pipelines frontend /_proxy/ route, bypasses ENABLE_AUTHZ=true

Quick assessment

Affected
kubeflow pipelines
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Kubeflow Pipelines 允许用户构建和部署可移植、可扩展的机器学习工作流。 在 2.17.0 之前的版本中，Kubeflow Pipelines 的前端通过 中的 路由暴露了一个未认证的服务器端请求伪造（SSRF）漏洞。 函数接受由攻击者控制的任意 HTTP 或 HTTPS 目标地址，并将其源站传递给 ，但并未实施主机名白名单，也未对回环地址、链路本地地址、RFC1918 私有地址或集群内部地址进行过滤。 当 时，该路由位于授权中间件之外，并且可通过 、 、 、 和 等路径访问，包括通过精心构造的 头

CVSS 10.0 · Critical

Possible ATT&CK Techniques 1 AI

T1021 · Remote Services

Affected Version Matrix 1

VendorProduct Version RangeStatus
kubeflow pipelines < 2.17.0 affected
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I. Basic Information for CVE-2026-54745

Vulnerability Information
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Vulnerability Title
Kubeflow Pipelines: Unauthenticated SSRF and HTTP smuggling in Kubeflow Pipelines frontend /_proxy/ route, bypasses ENABLE_AUTHZ=true
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
kubeflow pipelines < 2.17.0 -

II. Public POCs for CVE-2026-54745

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III. Intelligence Information for CVE-2026-54745

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Patches & Fixes for CVE-2026-54745 (1)

Vendor Advisories for CVE-2026-54745 (1)

Vendor Pages for CVE-2026-54745 (1)

IV. Related Vulnerabilities

Same vendor: kubeflow
Same weakness: CWE-284

V. Comments for CVE-2026-54745

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