Argo CD Unauthenticated Denial of Service (DoS) Vulnerability via /api/webhook Endpoint
Priority HIGH 72CWE-400Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-400.
Summary
Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. This report details a security vulnerability in Argo CD, where an unauthenticated attacker can send a specially crafted large JSON payload to the /api/webhook endpoint, causing excessive memory allocation that leads to service disruption by triggering an Out Of Memory (OOM) kill. The issue poses a high risk to the availability of Argo CD deployments. This vulnerability is fixed in 2.11.6, 2.10.15, and 2.9.20.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01392 72nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed argo-cd (argoproj): 2.9.20, 2.10.15, 2.11.6github.com/argoproj/argo-cd/v2 (Go): 2.9.20, 2.10.15, 2.11.6Red Hat: 3 advisories
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| argoproj | argo-cd | 1.0.0 to before 2.9.20; 2.10.0 to before 2.10.15; 2.11.0 to before 2.11.6 | 2.9.20, 2.10.15, 2.11.6 | Patch available | CNA |
| — | github.com/argoproj/argo-cd (Go) | 1.0.0 – 1.8.7 | — | No fix listed | GHSA-jmvp-698c-4x3w |
| — | github.com/argoproj/argo-cd/v2 (Go) | before 2.9.20 | 2.9.20 | Patch available | GHSA-jmvp-698c-4x3w |
| — | github.com/argoproj/argo-cd/v2 (Go) | 2.10.0 to before 2.10.15 | 2.10.15 | Patch available | GHSA-jmvp-698c-4x3w |
| — | github.com/argoproj/argo-cd/v2 (Go) | 2.11.0 to before 2.11.6 | 2.11.6 | Patch available | GHSA-jmvp-698c-4x3w |
- argo-cd Vendorargoproj Affected 1.0.0 to before 2.9.20; 2.10.0 to before 2.10.15; 2.11.0 to before 2.11.6 Fixed in 2.9.20, 2.10.15, 2.11.6 Patch available CNA
- github.com/argoproj/argo-cd (Go) Vendor— Affected 1.0.0 – 1.8.7 Fixed in — No fix listed GHSA-jmvp-698c-4x3w
- github.com/argoproj/argo-cd/v2 (Go) Vendor— Affected before 2.9.20 Fixed in 2.9.20 Patch available GHSA-jmvp-698c-4x3w
- github.com/argoproj/argo-cd/v2 (Go) Vendor— Affected 2.10.0 to before 2.10.15 Fixed in 2.10.15 Patch available GHSA-jmvp-698c-4x3w
- github.com/argoproj/argo-cd/v2 (Go) Vendor— Affected 2.11.0 to before 2.11.6 Fixed in 2.11.6 Patch available GHSA-jmvp-698c-4x3w
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:argoproj:argo_cd:*:*:*:*:*:*:*:* | 1.0.0 to before 2.9.20; 2.10.0 to before 2.10.15; 2.11.0 to before 2.11.6 | Vulnerable | argoproj |
- cpe:2.3:a:argoproj:argo_cd:*:*:*:*:*:*:*:* Versions 1.0.0 to before 2.9.20; 2.10.0 to before 2.10.15; 2.11.0 to before 2.11.6 Vulnerable ·argoproj
Remediation
- Fix · CNA argo-cd (argoproj) Fixed in 2.9.20, 2.10.15, 2.11.6
- Fix · GHSA-jmvp-698c-4x3w github.com/argoproj/argo-cd/v2 (Go) Fixed in 2.9.20 Advisory →
- Fix · GHSA-jmvp-698c-4x3w github.com/argoproj/argo-cd/v2 (Go) Fixed in 2.10.15 Advisory →
- Fix · GHSA-jmvp-698c-4x3w github.com/argoproj/argo-cd/v2 (Go) Fixed in 2.11.6 Advisory →
Red Hat 3 advisories
- RHSA-2024:4973 Released 2024-08-01 · Red Hat rating ImportantErrata Advisory for Red Hat OpenShift GitOps v1.12.5 security update
- Red Hat OpenShift GitOps 1.12 openshift-gitops-1/argo-rollouts-rhel8, openshift-gitops-1/argocd-rhel8, openshift-gitops-1/argocd-rhel9 +7
- RHSA-2024:4972 Released 2024-08-01 · Red Hat rating ImportantErrata Advisory for Red Hat OpenShift GitOps v1.11.7 security update
- Red Hat OpenShift GitOps 1.11 openshift-gitops-1/argo-rollouts-rhel8, openshift-gitops-1/argocd-rhel8, openshift-gitops-1/console-plugin-rhel8 +6
- RHSA-2024:4891 Released 2024-07-26 · Red Hat rating ImportantErrata Advisory for Red Hat OpenShift GitOps v1.13.1 security update
- Red Hat OpenShift GitOps 1.13 openshift-gitops-1/argo-rollouts-rhel8, openshift-gitops-1/argocd-rhel8, openshift-gitops-1/argocd-rhel9 +7
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat OpenShift GitOps 1.11 | Fixed | RHSA-2024:4972 |
| Red Hat OpenShift GitOps 1.12 | Fixed | RHSA-2024:4973 |
| Red Hat OpenShift GitOps 1.13 | Fixed | RHSA-2024:4891 |
Timeline
- 2026-10-02 Threatist record created from CVE-2024-40634
- 2026-10-03 Alias added: GHSA-jmvp-698c-4x3w
References
Patch 3
More argoproj Argo Cd vulnerabilities
- TI-2024-14377 Argo CD vulnerable to Bypassing of Brute Force Protection via Application Crash and In-Memory Data Loss CVSS 3.1CRITICAL 9.8
- TI-2024-14383 Argo CD vulnerable to Bypassing of Rate Limit and Brute Force Protection Using Cache Overflow CVSS 3.1CRITICAL 9.1
- TI-2026-31086 ArgoCD ServerSideDiff is vulnerable to Kubernetes Secret Extraction CVSS 3.1CRITICAL 9.6
- TI-2023-20919 Cluster secret might leak in cluster details page in Argo CD CVSS 3.1CRITICAL 9.9
- TI-2024-21088 ArgoCD Vulnerable to Use of Risky or Missing Cryptographic Algorithms in Redis Cache CVSS 3.1CRITICAL 9.1
- TI-2026-33475 Argo CD: Stored XSS in application link annotations enables developer-to-admin privilege escalation CVSS 3.1HIGH 8.7
Sources
- CVE-2024-40634 · CVE Program
- CVE-2024-40634 · NVD
- FIRST EPSS
- GHSA-jmvp-698c-4x3w · GitHub Advisory Database · CC BY 4.0
- CVE-2024-40634 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences