Argo Vulnerable to Unauthenticated Memory Exhaustion (DoS) in Webhook Interceptor — CVE-2026-42294

Summary

**Severity:** Medium **Component:** Webhook Interceptor (`server/auth/webhook`) **Vulnerability Type:** Denial of Service (DoS) ## Description The Webhook Interceptor loads the entire request body into memory before authenticating the request or verifying its signature. This occurs on the `/api/v1/events/` endpoint, which is publicly accessible (albeit intended for webhooks). An attacker can send a request with an…

Product

go: github.com/argoproj/argo-workflows/v3 | go: github.com/argoproj/argo-workflows/v4

What to do

General, cautious steps (verify details in the official source):

• Prioritize patching or mitigation immediately (treat as actively risky).
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

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