Kubeflow Pipelines — API server fetches a caller-supplied pipelineURL without host validation

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

5.0 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

EPSS

• CVE-2026-88983: 0.20% estimated exploitation activity in the next 30 days; percentile 9.86 (FIRST EPSS, 2026-11-10). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary The Kubeflow Pipelines API server fetched caller-supplied pipeline package URLs without restricting the destination. A caller authorized to create a pipeline or pipeline version could cause requests to originate from the API server's network position, including to internal services that the caller could not otherwise reach.

Impact The reported evidence demonstrates blind server-side request forgery and a limited status-code oracle. The fetched response is processed as a pipeline package; the report does not demonstrate arbitrary response-body disclosure or credential theft. A request to a cloud metadata endpoint returned HTTP 403, which does not establish access to metadata contents or tokens. The confidentiality metric is Low to reflect the limited information obtainable through the status-code oracle. High confidentiality impact and integrity or availability impact are not established by the submitted evidence. Impact depends on the API server's network reachability…

Published by the source

9 Nov 2026, 22:44 UTC

Last modified by the source

9 Nov 2026, 23:00 UTC

Source last checked

10 Nov 2026, 06:35 UTC

1. Revision 2 · amended · 10 Nov 2026

   Amended from osv record GHSA-f7vj-6669-qvv4

2. Revision 1 · created · 9 Nov 2026

   Published from ghsa record GHSA-f7vj-6669-qvv4

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# Patch Next advisory brief: CVE-2026-88983

Advisory: Kubeflow Pipelines — API server fetches a caller-supplied pipelineURL without host validation
IDs: CVE-2026-88983, GHSA-f7vj-6669-qvv4
Record: https://patchnext.com/advisories/cve-2026-88983 (revision 2, source checked 10 Nov 2026, 06:35 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.0)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/kubeflow/pipelines 0.0.0-20260517162502-504d7797c1e0. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/kubeflow/pipelines: affected < 0.0.0-20260517162502-504d7797c1e0; fixed in 0.0.0-20260517162502-504d7797c1e0

## Suggested inspection (read-only)
- Go github.com/kubeflow/pipelines: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/kubeflow/pipelines.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-f7vj-6669-qvv4 (GitHub-reviewed advisory GHSA-f7vj-6669-qvv4 lists affected ranges: Go github.com/kubeflow/pipelines >=0 <0.0.0-20260517162502-504d7797c1e0)
- Verified: https://osv.dev/vulnerability/GHSA-f7vj-6669-qvv4 (OSV record GHSA-f7vj-6669-qvv4 lists affected ranges: Go github.com/kubeflow/pipelines >=0 <0.0.0-20260517162502-504d7797c1e0 (fixed))

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