---
id: CVE-2026-88980
title: >-
  Kubeflow Pipelines: Unauthenticated server-side request forgery in the
  frontend http/https artifact source via decimal-IP bypass of the bucket
  validator
summary: >-
  Kubeflow Pipelines enables users to build and deploy portable, scalable
  machine learning workflows. Prior to 2.18.0, the frontend GET /artifacts/get
  route accepts source=http or source=https with caller-controlled bucket and
  key values, …
severity: high
cvss: 8.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-918
vendor: kubeflow
product: pipelines
affected:
  - pipelines < 2.18.0
published: '2026-11-05'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T22:18:05.010Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-88980'
references:
  - url: >-
      https://github.com/kubeflow/pipelines/security/advisories/GHSA-v3vh-xv5f-p4p4
    label: >-
      https://github.com/kubeflow/pipelines/security/advisories/GHSA-v3vh-xv5f-p4p4
  - url: 'https://github.com/kubeflow/pipelines/pull/13677'
    label: 'https://github.com/kubeflow/pipelines/pull/13677'
  - url: >-
      https://github.com/kubeflow/pipelines/commit/4d9bc5ab12b67efedb3923ef428a399cb445cf5f
    label: >-
      https://github.com/kubeflow/pipelines/commit/4d9bc5ab12b67efedb3923ef428a399cb445cf5f
  - url: 'https://github.com/kubeflow/pipelines/releases/tag/2.18.0'
    label: 'https://github.com/kubeflow/pipelines/releases/tag/2.18.0'
tags:
  - cve.org
ingestedAt: '2026-11-05T23:41:31.947Z'
---

## Overview

Kubeflow Pipelines enables users to build and deploy portable, scalable machine learning workflows. Prior to 2.18.0, the frontend GET /artifacts/get route accepts source=http or source=https with caller-controlled bucket and key values, and isAllowedResourceName permits an all-digit decimal host that the URL parser converts to an IPv4 address. The default ALLOWED_ARTIFACT_DOMAIN_REGEX and authorization-disabled standalone configuration allow an unauthenticated caller to fetch internal HTTP resources and receive their response body. In the authenticated multi-user configuration, the same destination-validation defect is reachable by a low-privilege tenant with a valid identity and authorized namespace. Cloud credential disclosure depends on reachable metadata services and attached roles, and the issue does not establish IMDSv2 bypass or credential access when metadata is blocked. This issue is fixed in version 2.18.0.

## Affected

- `pipelines < 2.18.0`

## Remediation

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