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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是Kubeflow基金会开源的一套机器学习工作流管理工具。 Kubeflow pipelines 2.17.0之前版本存在安全漏洞，该漏洞源于frontend/server/proxy-middleware.ts中的/_proxy/路由存在服务端请求伪造漏洞，_routePathWithReferer()函数接受攻击者控制的HTTP或HTTPS目标，未进行主机白名单或对回环地址、链路本地地址、RFC1918地址或集群本地地址过滤，导致攻击者可通过/apis/v1beta

CVSS 10.0 · Critical EPSS 0.62% · P49

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
Vulnerability Title
Kubeflow pipelines 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kubeflow pipelines是Kubeflow基金会开源的一套机器学习工作流管理工具。 Kubeflow pipelines 2.17.0之前版本存在安全漏洞，该漏洞源于frontend/server/proxy-middleware.ts中的/_proxy/路由存在服务端请求伪造漏洞，_routePathWithReferer()函数接受攻击者控制的HTTP或HTTPS目标，未进行主机白名单或对回环地址、链路本地地址、RFC1918地址或集群本地地址过滤，导致攻击者可通过/apis/v1beta
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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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