Argo CD Vulnerability in Azure DevOps Webhook Configuration
CVE-2025-59538

7.5HIGH

Key Information:

Vendor

Argoproj

Status
Argo-cd
Vendor
CVE Published:
1 October 2025

What is CVE-2025-59538?

In Argo CD, when the webhook settings for Azure DevOps are not configured with a username and password, the /api/webhook endpoint may crash the argocd-server process upon receiving a specific JSON payload from Azure DevOps. This occurs when the resource.refUpdates array is empty, leading to an index being accessed without proper length validation. This vulnerability can be triggered via a single unauthenticated HTTP POST request, resulting in a denial of service for the affected server. Updates have been made in versions 2.14.20, 3.2.0-rc2, 3.1.8, and 3.0.19 to mitigate this issue.

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Affected Version(s)

argo-cd >= 2.9.0-rc1, < 2.14.20 < 2.9.0-rc1, 2.14.20

argo-cd >= 3.2.0-rc1, < 3.2.0-rc2 < 3.2.0-rc1, 3.2.0-rc2

argo-cd >= 3.1.0-rc1, < 3.1.8 < 3.1.0-rc1, 3.1.8

References

https://github.com/argoproj/argo-cd/security/advisories/G...
x_refsource_CONFIRM
https://github.com/argoproj/argo-cd/commit/1a023f1ca7fe4e...
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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