Is CVE-2026-118761 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-118761 being exploited in the wild.

How severe is CVE-2026-118761?

High severity, with a CVSS score of 7.5, published 29 October 2026.

Which products and versions are affected?

github.com/kubeflow/pipelines (Go) < 0.0.0-20260831164314-ba9ae72cc860, SEMVER:introduced=0,fixed=0.0.0-20260831164314-ba9ae72cc860; Kubeflow Pipelines prior to 2.18.0.

How is CVE-2026-118761 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-118761?

Check whether you run github.com/kubeflow/pipelines (Go) or Kubeflow Pipelines at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-118761: Kubeflow Pipelines zip bomb denial of service in archive upload

Q: Is there a fix for CVE-2026-118761?

Yes. github.com/kubeflow/pipelines (Go): upgrade to 0.0.0-20260831164314-ba9ae72cc860 or later. Until then: Restrict API server network access to trusted callers only until upgrade. URL-import handlers authorize before decompression, so imports from trusted sources are safer than multipart uploads. [{"kind":"advisory","at":"2026-10-29"},{"kind":"patched","at":"2026-08-27","note":"Fix commit merged to prevent zip bomb via uncompressed size limits"}] Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

CVE-2026-118761 · Severity: high · CVSS 7.5 · Published 2026-10-29

Kubeflow Pipelines is a system for building machine learning workflows. The API server fails to limit decompression of uploaded pipeline archives, allowing attackers to upload highly compressed files that expand to gigabytes and crash the server through memory exhaustion. This impacts any deployment allowing unauthenticated pipeline uploads.

Technologies: github.com/kubeflow/pipelines (Go), Kubeflow Pipelines. Vendors: Go, Kubeflow.

Quick answers

Is CVE-2026-118761 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-118761 being exploited in the wild.
How severe is CVE-2026-118761?: High severity, with a CVSS score of 7.5, published 29 October 2026.
Which products and versions are affected?: github.com/kubeflow/pipelines (Go) < 0.0.0-20260831164314-ba9ae72cc860, SEMVER:introduced=0,fixed=0.0.0-20260831164314-ba9ae72cc860; Kubeflow Pipelines prior to 2.18.0.
Is there a fix for CVE-2026-118761?: Yes. github.com/kubeflow/pipelines (Go): upgrade to 0.0.0-20260831164314-ba9ae72cc860 or later. Until then: Restrict API server network access to trusted callers only until upgrade. URL-import handlers authorize before decompression, so imports from trusted sources are safer than multipart uploads.</anigation> <parameter name="timeline">[{"kind":"advisory","at":"2026-10-29"},{"kind":"patched","at":"2026-08-27","note":"Fix commit merged to prevent zip bomb via uncompressed size limits"}] Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-118761 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-118761?: Check whether you run github.com/kubeflow/pipelines (Go) or Kubeflow Pipelines at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

github.com/kubeflow/pipelines (Go): upgrade to 0.0.0-20260831164314-ba9ae72cc860 or later
```
go get github.com/kubeflow/pipelines@v0.0.0-20260831164314-ba9ae72cc860
```

Restrict API server network access to trusted callers only until upgrade. URL-import handlers authorize before decompression, so imports from trusted sources are safer than multipart uploads.</anigation> <parameter name="timeline">[{"kind":"advisory","at":"2026-10-29"},{"kind":"patched","at":"2026-08-27","note":"Fix commit merged to prevent zip bomb via uncompressed size limits"}]

Technical details

The vulnerability is a zip bomb / compression bomb (CWE-409) in the pipeline archive upload handler. Compressed pipeline files (.zip, .tar.gz) are decompressed into memory without enforcing limits on uncompressed size, only on compressed size. An attacker can upload a small, highly-compressed archive that expands to exhaust API-server memory and trigger OOM. Pipeline upload processing decompresses before namespace authorization, so no prior authentication is required for multipart uploads.

Affected products

Kubeflow Pipelines prior to 2.18.0

Identifiers

CVE-2026-118761
GHSA-8fmv-6rg5-5924
GO-2026-6899

References

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