What’s Vulnerable › Vulnerabilities

CVE-2026-118761: Kubeflow Pipelines: Pipeline archive upload allows decompression bomb to exhaust server memory

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-29 · updated 2026-10-30
• Weakness: CWE-409

Description

Kubeflow Pipelines enables users to build and deploy portable, scalable machine learning workflows. Prior to 2.18.0, the API server decompressed uploaded pipeline archives without adequately bounding expanded data while locating or reading the pipeline file. A small ZIP or gzip-compressed tar archive can consume disproportionately large memory and exhaust API-server resources. Multipart pipeline and pipeline-version upload processing performs decompression before namespace authorization, so a reachable caller does not need a successful pipeline-create authorization decision. URL-import handlers authorize before fetching and decompressing a remote archive. The amount of expansion required to interrupt service depends on deployment resource limits and concurrent activity, and no specific archive is guaranteed to crash every deployment. This issue is fixed in version 2.18.0.

Affected products

• kubeflow pipelines: before 2.18.0

References

• https://github.com/kubeflow/pipelines/commit/1121d9a081fdf9e2107c39abb2cd8947727c6953
• https://github.com/kubeflow/pipelines/commit/ba9ae72cc860e3afbea232185e4132fc2896cac5
• https://github.com/kubeflow/pipelines/pull/14171
• https://github.com/kubeflow/pipelines/pull/14186
• https://github.com/kubeflow/pipelines/releases/tag/2.18.0
• https://github.com/kubeflow/pipelines/security/advisories/GHSA-8fmv-6rg5-5924

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