Description
Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. Prior to versions 3.7.14 and 4.0.5, 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 extremely large body (e.g., multiple gigabytes), causing the Argo Server to allocate excessive memory, potentially leading to an Out-Of-Memory (OOM) crash and denial of service. This issue has been patched in versions 3.7.14 and 4.0.5.
Published: 2026-05-09
Score: 8.2 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-jcc8-g2q4-9fxq Argo Vulnerable to Unauthenticated Memory Exhaustion (DoS) in Webhook Interceptor
History

Thu, 14 May 2026 18:45:00 +0000

Type Values Removed Values Added
First Time appeared Argoproj argo Workflows
CPEs cpe:2.3:a:argoproj:argo_workflows:*:*:*:*:*:go:*:*
Vendors & Products Argoproj argo Workflows
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Mon, 11 May 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sat, 09 May 2026 05:45:00 +0000

Type Values Removed Values Added
First Time appeared Argoproj
Argoproj argo-workflows
Vendors & Products Argoproj
Argoproj argo-workflows

Sat, 09 May 2026 04:15:00 +0000

Type Values Removed Values Added
Description Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. Prior to versions 3.7.14 and 4.0.5, 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 extremely large body (e.g., multiple gigabytes), causing the Argo Server to allocate excessive memory, potentially leading to an Out-Of-Memory (OOM) crash and denial of service. This issue has been patched in versions 3.7.14 and 4.0.5.
Title Argo Workflows: Unauthenticated Memory Exhaustion (DoS) in Webhook Interceptor
Weaknesses CWE-770
References
Metrics cvssV4_0

{'score': 8.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


Subscriptions

Argoproj Argo-workflows Argo Workflows
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-11T15:47:21.683Z

Reserved: 2026-04-26T12:13:55.551Z

Link: CVE-2026-42294

cve-icon Vulnrichment

Updated: 2026-05-11T15:46:55.942Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-09T04:16:24.903

Modified: 2026-05-14T18:34:34.543

Link: CVE-2026-42294

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-09T05:30:16Z

Weaknesses