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


- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Fix available:** No
- **Published:** 29 Oct 2026
- **Updated:** 29 Oct 2026
- **Also known as:** GHSA-8fmv-6rg5-5924

## What is CVE-2026-118761?

CVE-2026-118761 is a high-severity vulnerability in kubeflow pipelines, published on 29 Oct 2026. 

### Official 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.

Weakness: CWE-409 (Improper Handling of Highly Compressed Data (Data Amplification))

## Which versions are affected by CVE-2026-118761?


## How do I fix CVE-2026-118761?

No fix has been published for CVE-2026-118761 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-118761 being exploited?

There is no known exploitation of CVE-2026-118761 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-118761 and fix it if it is affected.

What it is: CVE-2026-118761 is a high-severity vulnerability in kubeflow pipelines, published on 29 Oct 2026. 
Exploitation: There is no known exploitation of CVE-2026-118761 in the wild and no public exploit code.

Affected product: kubeflow pipelines. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-118761/ (Markdown: https://insights.sbomify.com/CVE-2026-118761/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-118761
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-118761
- OSV: https://osv.dev/vulnerability/CVE-2026-118761

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-118761/
Summaries are generated and may contain mistakes; the official description above is the record.