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  4. CVE 2026 88982 kubeflow pipelines cross tenant execution cache
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Back to active CVEs
Medium · CVSS 5.4CVE-2026-88982

Kubeflow Pipelines: Cross-tenant execution-cache poisoning / output substitution via a namespace-blind cache key in the cache webhook (multi-user)CVE-2026-88982

Answer in brief

CVE-2026-88982 records a Medium severity (CVSS 5.4) vulnerability in Kubeflow Pipelines: Cross-tenant execution-cache poisoning / output substitution via a namespace-blind cache key in the cache webhook (multi-user). The current sources do not mark it as known exploited. The current feed maps kubeflow/pipelines (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 5, 2026Updated Nov 5, 2026Source checked Nov 5, 2026First seen by HOL Nov 5, 2026Material review Nov 5, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.4
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 5.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps kubeflow/pipelines (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
kubeflow/pipelinesgeneric<2.18.02.18.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for kubeflow/pipelines.
  2. 2Review the reported fix. Update kubeflow/pipelines to 2.18.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Nov 5, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 5, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 5, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source description

Kubeflow Pipelines enables users to build and deploy portable, scalable machine learning workflows. Prior to 2.18.0, the legacy V1/raw-Argo execution cache mutating webhook and cache-server storage path hash selected template fields without the Kubernetes namespace, use the key alone for lookups and duplicate checks, and trust the mutable pipelines.kubeflow.org/execution_cache_key annotation when publishing outputs. In multi-user deployments where tenant namespaces share the cache service, a tenant with workload-submission privileges can read another namespace's cached outputs or seed matching outputs that are substituted into a later step. Standard KFP V2 component pods bypass this cache, matching requires the selected template fields and staleness policy, and arbitrary code execution or service availability impact is not established. This issue is fixed in version 2.18.0.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Kubeflow Pipelines API server lacks authorization for shared pipeline uploadsSame kubeflow/pipelines package
  • Kubeflow Pipelines: Unauthenticated SSRF vulnerability in Kubeflow Pipelines TensorBoard proxySame kubeflow/pipelines package
  • Kubeflow Pipelines: Unauthenticated server-side request forgery in the frontend http/https artifact source via decimal-IP bypass of the bucket validatorSame kubeflow/pipelines package
  • Kubeflow Pipelines: Unauthenticated SSRF through artifact provider endpointsSame kubeflow/pipelines package
  • Kubeflow Pipelines — API server fetches a caller-supplied pipelineURL without host validationSame kubeflow/pipelines package
  • Kubeflow Pipelines: RBAC bypass on shared pipelines allows any authenticated user to delete or modify global pipelinesSame kubeflow/pipelines package

Record context

Vulnerability class
RCE
EPSS
Not reported
CWE IDs
CWE-345, CWE-639
Source
CVE List V5
Source checked
Nov 5, 2026
References
4 linked sources
Open source record