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Fencer Vulns
high 7.5

CVE-2024-40634 json

Argo CD Unauthenticated Denial of Service (DoS) Vulnerability via /api/webhook Endpoint

published 2024-07-22 2 y ago modified 2026-09-10 1 mo ago also BIT-argo-cd-2024-40634 , EUVD-2024-2379 , GHSA-jmvp-698c-4x3w , GO-2024-3002

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.4%
EPSS 1.4% chance of exploitation in 30 days, percentile 72%
public exploits
0
none known

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.

Patch / fix

  • go github.com/argoproj/argo-cd/v2 2.9.20, 2.10.15, 2.11.6
  • bitnami argo-cd 2.11.6
  • argoproj argo-cd 2.9.20, 2.10.15, 2.11.6

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-40634 updated cvss 7.5

argocd: Unauthenticated Denial of Service (DoS) Vulnerability via /api/webhook Endpoint in Argo CD

  • Red Hat OpenShift GitOps 1.11 openshift-gitops-1/dex-rhel8 v1.11.7-2, openshift-gitops-1/argocd-rhel8 v1.11.7-2, openshift-gitops-1/gitops-rhel8 v1.11.7-2, openshift-gitops-1/must-gather-rhel8 v1.11.7-2, openshift-gitops-1/kam-delivery-rhel8 v1.11.7-2, openshift-gitops-1/argo-rollouts-rhel8 v1.11.7-2, +3 more
    fixed: vendor fix RHSA-2024:4972
  • Red Hat OpenShift GitOps 1.12 openshift-gitops-1/dex-rhel8 v1.12.5-5, openshift-gitops-1/argocd-rhel8 v1.12.5-5, openshift-gitops-1/argocd-rhel9 v1.12.5-2, openshift-gitops-1/gitops-rhel8 v1.12.5-5, openshift-gitops-1/must-gather-rhel8 v1.12.5-5, openshift-gitops-1/kam-delivery-rhel8 v1.12.5-5, +4 more
    fixed: vendor fix RHSA-2024:4973
  • Red Hat OpenShift GitOps 1.13 openshift-gitops-1/dex-rhel8 v1.13.1-6, openshift-gitops-1/argocd-rhel8 v1.13.1-6, openshift-gitops-1/argocd-rhel9 v1.13.1-1, openshift-gitops-1/gitops-rhel8 v1.13.1-6, openshift-gitops-1/must-gather-rhel8 v1.13.1-6, openshift-gitops-1/kam-delivery-rhel8 v1.13.1-6, +4 more
    fixed: vendor fix RHSA-2024:4891

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

1.39% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/argoproj/argo-cd/security/advisories/GHSA-jmvp-698c-4x3w referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
go github.com/argoproj/argo-cd
>=1.0.0, <=1.8.7
>=1.0.0
 no fix listed
go github.com/argoproj/argo-cd/v2
<2.9.20
>=2.10.0, <2.10.15
>=2.11.0, <2.11.6
2.9.20
2.10.15
2.11.6
bitnami argo-cd
>=1.0.0, <2.11.6
2.11.6

Affected products

  • argoproj argo-cd

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.