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

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 允许用户构建并部署可移植、可扩展的机器学习工作流。在 2.18.0 版本之前，遗留的 V1/raw-Argo 执行缓存（execution cache）变体 webhook 以及缓存服务器（cache-server）的存储路径哈希，在选取模板字段时未包含 Kubernetes 命名空间，仅使用键（key）进行查找和重复检查，并在发布输出时信任可变的 注解。在多个用户共享同一缓存服务的租户命名空间部署环境中，拥有工作负载提交权限的租户可以读取其他命名空间的缓存输出，或注入匹配的缓

CVSS 5.4 · Medium

Possible ATT&CK Techniques 2 AI

T1070.004 · File Deletion T1562.004
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I. Basic Information for CVE-2026-88982

Vulnerability Information
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Vulnerability Title
Kubeflow Pipelines: Cross-tenant execution-cache poisoning / output substitution via a namespace-blind cache key in the cache webhook (multi-user)
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对数据真实性的验证不充分
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
kubeflow pipelines < 2.18.0 -

II. Public POCs for CVE-2026-88982

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III. Intelligence Information for CVE-2026-88982

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Vendor Pages for CVE-2026-88982 (1)

Other References for CVE-2026-88982 (3)

Same Patch Batch · kubeflow · 2026-11-05 · 9 CVEs total

CVE-2026-77596 9.6 CRITICAL Kubeflow Pipelines API server lacks authorization for shared pipeline uploads
CVE-2026-88981 8.6 HIGH Kubeflow Pipelines: Unauthenticated SSRF through artifact provider endpoints
CVE-2026-88980 8.6 HIGH Kubeflow Pipelines: Unauthenticated server-side request forgery in the frontend http/https
CVE-2026-88984 7.2 HIGH Kubeflow Pipelines: RBAC bypass on shared pipelines allows any authenticated user to delet
CVE-2026-88985 6.5 MEDIUM Kubeflow Pipelines: SQL injection through unvalidated pagination tokens in Kubeflow Pipeli
CVE-2026-88986 6.1 MEDIUM Kubeflow Pipelines: Reflected XSS in the frontend pod information and events error respons
CVE-2026-88979 5.8 MEDIUM Kubeflow Pipelines: Unauthenticated SSRF vulnerability in Kubeflow Pipelines TensorBoard p
CVE-2026-88983 5.0 MEDIUM Kubeflow Pipelines — API server fetches a caller-supplied pipelineURL without host validat

IV. Related Vulnerabilities

Same product: pipelines
Same vendor: kubeflow
Same weakness: CWE-345