CVE-2026-42294

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/argoproj/argo-workflows/commit/7abb4de6c3599e2d5d960ba4d5de4cf1df109965	Patch
https://github.com/argoproj/argo-workflows/releases/tag/v3.7.14	Release Notes
https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5	Release Notes
https://github.com/argoproj/argo-workflows/security/advisories/GHSA-jcc8-g2q4-9fxq	Exploit Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-42294
https://bugzilla.redhat.com/show_bug.cgi?id=2468443
https://github.com/argoproj/argo-workflows/security/advisories/GHSA-jcc8-g2q4-9fxq	Exploit Vendor Advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42294.json

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:argoproj:argo_workflows::::::go::*
	cpe:2.3:a:argoproj:argo_workflows::::::go::*

History

No history.

Information

Published : 2026-05-09 04:16

Updated : 2026-07-24 21:10

NVD link : CVE-2026-42294

Mitre link : CVE-2026-42294

CVE.ORG link : CVE-2026-42294

JSON object : View

Products Affected

argoproj

argo_workflows

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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