CVE-2026-42294: CWE-770: Allocation of Resources Without Limits or Throttling in argoproj argo-workflows
CVE-2026-42294 is a high-severity vulnerability in Argo Workflows prior to versions 3. 7. 14 and 4. 0. 5. The Webhook Interceptor component loads the entire request body into memory before authenticating or verifying the request signature on the publicly accessible /api/v1/events/ endpoint. An attacker can exploit this by sending a very large request body, causing excessive memory allocation that may lead to an Out-Of-Memory (OOM) crash and denial of service. This issue has been fixed in versions 3. 7. 14 and 4.
AI Analysis
Technical Summary
Argo Workflows, a container-native workflow engine for Kubernetes, had a resource allocation vulnerability (CWE-770) in its Webhook Interceptor. Before versions 3.7.14 and 4.0.5, the interceptor loads the entire request body into memory on the /api/v1/events/ endpoint before authentication or signature verification. This allows an attacker to send extremely large payloads, causing the Argo Server to consume excessive memory and potentially crash due to OOM conditions. The vulnerability is addressed by patching in the specified versions.
Potential Impact
Successful exploitation can cause the Argo Server to allocate excessive memory, leading to an Out-Of-Memory crash and denial of service. There is no indication of privilege escalation or data compromise from the provided data. The vulnerability affects publicly accessible endpoints, increasing the risk of remote denial of service attacks.
Mitigation Recommendations
This vulnerability is patched in Argo Workflows versions 3.7.14 and 4.0.5. Users should upgrade to these or later versions to remediate the issue. No other mitigation or temporary workaround is specified in the vendor advisory or CVE data.
CVE-2026-42294: CWE-770: Allocation of Resources Without Limits or Throttling in argoproj argo-workflows
Description
CVE-2026-42294 is a high-severity vulnerability in Argo Workflows prior to versions 3. 7. 14 and 4. 0. 5. The Webhook Interceptor component loads the entire request body into memory before authenticating or verifying the request signature on the publicly accessible /api/v1/events/ endpoint. An attacker can exploit this by sending a very large request body, causing excessive memory allocation that may lead to an Out-Of-Memory (OOM) crash and denial of service. This issue has been fixed in versions 3. 7. 14 and 4.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Argo Workflows, a container-native workflow engine for Kubernetes, had a resource allocation vulnerability (CWE-770) in its Webhook Interceptor. Before versions 3.7.14 and 4.0.5, the interceptor loads the entire request body into memory on the /api/v1/events/ endpoint before authentication or signature verification. This allows an attacker to send extremely large payloads, causing the Argo Server to consume excessive memory and potentially crash due to OOM conditions. The vulnerability is addressed by patching in the specified versions.
Potential Impact
Successful exploitation can cause the Argo Server to allocate excessive memory, leading to an Out-Of-Memory crash and denial of service. There is no indication of privilege escalation or data compromise from the provided data. The vulnerability affects publicly accessible endpoints, increasing the risk of remote denial of service attacks.
Mitigation Recommendations
This vulnerability is patched in Argo Workflows versions 3.7.14 and 4.0.5. Users should upgrade to these or later versions to remediate the issue. No other mitigation or temporary workaround is specified in the vendor advisory or CVE data.
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
Threat ID: 69ffe1afcbff5d8610eaca07
Added to database: 5/10/2026, 1:38:55 AM
Last enriched: 5/10/2026, 1:39:46 AM
Last updated: 5/10/2026, 10:18:21 AM
Views: 6
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