# CVE-2026-18621: Data-sciences-pipeline: dsp: v1 argo template path accepts arbitrary workflow spec, bypassing all v2 security hardening

> Attackers with namespace editor privileges can bypass security hardening via the V1 API to gain node-root access and execute arbitrary code.

- **Severity:** High 7.6 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Aug 2026
- **Updated:** 19 Oct 2026
- **Also known as:** GHSA-6wxg-hpw6-m2x7

## What is CVE-2026-18621?

CVE-2026-18621 is a high-severity vulnerability in Red Hat AI Inference Server, published on 10 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A flaw was found in Data Science Pipelines (DSP). An attacker with namespace editor privileges can bypass security hardening by submitting a malicious Argo Workflow through the V1 API path. This allows the API server to create pods with elevated privileges, acting as a 'confused deputy' on behalf of the attacker. Successful exploitation grants the attacker node-root access, enabling arbitrary code execution and full control over the underlying node.

Weakness: CWE-266 (Incorrect Privilege Assignment)

## Which versions are affected by CVE-2026-18621?


## How do I fix CVE-2026-18621?

No fix has been published for CVE-2026-18621 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-18621 being exploited?

There is no known exploitation of CVE-2026-18621 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-18621 and fix it if it is affected.

What it is: CVE-2026-18621 is a high-severity vulnerability in Red Hat AI Inference Server, published on 10 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-18621 in the wild and no public exploit code.

Affected product: Red Hat AI Inference Server. 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-2026-18621/ (Markdown: https://insights.sbomify.com/CVE-2026-18621/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-18621
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-18621
- OSV: https://osv.dev/vulnerability/CVE-2026-18621

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-18621/
Summaries are generated and may contain mistakes; the official description above is the record.