CVE-2026-42294: CWE-770: Allocation of Resources Without Limits or Throttling in argoproj argo-workflows
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.
AI Analysis
Technical Summary
Argo Workflows, an open source container-native workflow engine for Kubernetes, contains a resource allocation vulnerability (CWE-770) in its Webhook Interceptor prior to versions 3.7.14 and 4.0.5. The interceptor loads the entire request body into memory before authentication or signature verification on the /api/v1/events/ endpoint, which is publicly accessible. This allows an attacker to send requests with extremely large bodies, causing the Argo Server to allocate excessive memory and potentially crash due to out-of-memory conditions, leading to denial of service. The vulnerability is addressed by patches in versions 3.7.14 and 4.0.5.
Potential Impact
Successful exploitation can cause the Argo Server to consume excessive memory resources, leading to an out-of-memory crash and denial of service. There is no indication of data compromise or privilege escalation. The vulnerability affects availability by crashing the service.
Mitigation Recommendations
This vulnerability is patched in Argo Workflows versions 3.7.14 and 4.0.5. Users should upgrade to at least these versions to remediate the issue. No vendor advisory indicates alternative mitigations or that no action is required. Patch status is confirmed by the vendor advisory. There is no indication that this is a cloud service with vendor-managed remediation.
CVE-2026-42294: CWE-770: Allocation of Resources Without Limits or Throttling in argoproj argo-workflows
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.
CVSS v4.0
Score 8.2high
Affected software
pkg:github/argoproj/argo-workflowsRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Argo Workflows, an open source container-native workflow engine for Kubernetes, contains a resource allocation vulnerability (CWE-770) in its Webhook Interceptor prior to versions 3.7.14 and 4.0.5. The interceptor loads the entire request body into memory before authentication or signature verification on the /api/v1/events/ endpoint, which is publicly accessible. This allows an attacker to send requests with extremely large bodies, causing the Argo Server to allocate excessive memory and potentially crash due to out-of-memory conditions, leading to denial of service. The vulnerability is addressed by patches in versions 3.7.14 and 4.0.5.
Potential Impact
Successful exploitation can cause the Argo Server to consume excessive memory resources, leading to an out-of-memory crash and denial of service. There is no indication of data compromise or privilege escalation. The vulnerability affects availability by crashing the service.
Mitigation Recommendations
This vulnerability is patched in Argo Workflows versions 3.7.14 and 4.0.5. Users should upgrade to at least these versions to remediate the issue. No vendor advisory indicates alternative mitigations or that no action is required. Patch status is confirmed by the vendor advisory. There is no indication that this is a cloud service with vendor-managed remediation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-26T12:13:55.551Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-42294","vendor":"Red Hat"}]
Threat ID: 69ffe1afcbff5d8610eaca07
Added to database: 05/10/2026, 01:38:55 UTC
Last enriched: 07/15/2026, 09:16:00 UTC
Last updated: 08/14/2026, 12:41:10 UTC
Views: 125
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