Argo CD v3.5 Release Candidate

Back to Devoured - June 26, 2026

DEVOURED

Argo CD v3.5 Release Candidate

DevOps cloudkubernetesgitops Argo Project

Argo CD 3.5 brings official Helm 4 compatibility, mTLS for repo-servers, and new UI-based deployment previews for ApplicationSets.

What: The v3.5 release candidate adds major features including beta support for impersonation, source integrity validation, expanded multi-tenancy, and Gateway API visualization to improve reliability and performance in large GitOps environments.

Why it matters: The transition to Helm 4 and native mTLS support signals a maturation of GitOps tooling toward more secure, performant standards for enterprise infrastructure.

Deep dive

Added ApplicationSet UI support with deployment previews.
Introduced beta support for impersonation and Source Hydrator.
Added official support for Helm 4.
Enabled mTLS for secure repo-server communication.
Improved source integrity validation.
Expanded multi-tenancy features for large-scale environments.
Enhanced Azure integration, Gateway API visualization, and CLI namespace support.

Decoder

GitOps: An operational framework that takes DevOps best practices used for application development and applies them to infrastructure automation, where Git serves as the source of truth.
ApplicationSet: An Argo CD controller that automates the deployment of multiple applications from a single source.
mTLS (Mutual TLS): A security protocol that ensures both the client and the server in a communication exchange are authenticated to each other.

Original article

Argo CD 3.5 introduces major enhancements, including ApplicationSet UI support with deployment previews, beta status for impersonation and Source Hydrator, Helm 4 compatibility, repo-server mTLS, source integrity validation, and expanded multi-tenant capabilities for large-scale GitOps environments. The release also improves Azure integration, Gateway API visualization, CLI namespace support, application search, reliability, performance, and documentation.

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