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Unpatched Argo CD vulnerability allows remote code execution and cluster takeover

Feeds.4Sysops •IT News • July 2, 2026

Argo CD, a popular GitOps tool for automating software deployments to Kubernetes, contains an unpatched vulnerability in its repo-server component. Security researchers discovered that an unauthenticated attacker can achieve remote code execution if they gain access to the service's internal gRPC endpoint. The flaw stems from how the system handles Kustomize options, allowing malicious actors to inject attacker-controlled settings through a crafted request. Source

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Unpatched Argo CD Vulnerability Enables Remote Code Execution in Kubernetes Clusters A newly disclosed vulnerability in Argo CD's repo-server component allows unauthenticated attackers to execute remote code and potentially take over Kubernetes clusters. The flaw, which affects the GenerateManifest gRPC endpoint, enables attackers to inject malicious Kustomize options through crafted requests. Security firm Synacktiv reported that exploitation requires access to the repo-server and Redis database ports, which should not be exposed to users. However, default configurations in Helm chart deployments do not enable necessary Kubernetes network policies, increasing risk. The vulnerability remains unpatched as of July 2, 2026, and organizations are advised to implement strict network policies to mitigate risks. This incident highlights the importance of treating GitOps infrastructure as tier zero. The vulnerability was first reported to Argo CD maintainers in January 2025. 2 sources 70

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Unpatched Argo CD vulnerability allows remote code execution and cluster takeover

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Extracted Entities

Attack Types (1)

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Platforms (2)