Argo CD v3.3.7 released on 16-04-2026
Argo CD v3.3.7 is out now. Operators should be cautious: a potential application reconciliation bug may prevent the application controller from refreshing applications, causing apps to fail to sync or to report resources as in‑sync/out‑of‑sync incorrectly.
Check GitHub issue #27344 and the release notes for details and mitigation guidance; follow the supplied Quick Start install and upgrade commands for non‑HA and HA deployments and test changes in staging before rolling out to production.
What’s in this release
- Critical application reconciliation advisory: see Issue #27344 — the controller may not refresh applications, which can affect sync status.
- Install & upgrade Quick Start for non‑HA and HA: create namespace argocd and apply the v3.3.7 manifests server‑side with –force-conflicts.
- Bug fixes, runtime and UI improvements plus security and performance updates (parentUIDToChildren map‑of‑sets change, reduced secret deep‑copies, OIDC refresh at restart, UI fixes, added security headers, helm dependency handling, and an e2e test for reverse deletionOrder).
Upgrade notes
- Known issue: the application controller refresh bug — monitor issue #27344 for progress and mitigation guidance and evaluate impacts in staging before upgrading production clusters.
- Use the provided install/upgrade commands (kubectl apply –server-side –force-conflicts) and read the Argo CD upgrade documentation when moving between minor versions to avoid breaking changes.
Share any comments on your experience with the upgrade or the reconciliation issue so others can learn from practical results.
