Argo CD v3.5.1 — Release Notes & Engineering Impact

Source available — automated, not human-reviewed

Component: argocd · Channel: stable. Automated analysis, not a compatibility certification. How this works.

Analysis updated: 2026-11-01.

Compatibility not verified — check source notes

📄 .MD

🔧 Bug Fixes 6

⚡ Executive Summary (TL;DR)

Argo CD v3.5.1. Source highlight: kubectl create namespace argocd

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Who Does This Impact? (Role-Based Analysis)

💻 Software Engineers & Devs

Check the source notes against the package and APIs you use before upgrading.

📊 Product & Engineering Leads

Use the documented changes to assess relevance to your product; release frequency alone is not a quality measure.

⚙️ DevOps & Security

Verify the target version, runtime requirements and rollback procedure in the official documentation.

🔧 Bug Fixes & Patches (6)

33f3bc59faeec96204cda3a5ae211be17d15f1ac: fix(appset): stop progressive sync reconciling in a tight loop (#27577) (#29139) (@himeshp)
d358e75b3539c3fc43eb2372317bde7a0d01c55f: fix(appset): verify terminating Applications against the API server (#29042) (#29138) (@himeshp)
ecf37373a9d3a72b259a73abfee7ce27226b960a: fix(controller): cherry-pick treat `timeout.reconciliation=0` as disabled soft expiry (#27683) (#29007) (@aali309)
978fa65006565baaaf35894918fd661d610f5953: fix(controller): reuse server-side diff result when masking Secret data (#27858) (#29074) (@1ovsss)
f399c84f85fc4e3a19ac1e8314ff111493d26fee: fix(controller): use diff cache when timeout.reconciliation is disabled (cherry-pick #29073 for 3.5) (#29158) (@argo-cd-cherry-pick-bot[bot])
960bed7f2efcdc8b43fe392dd6d17cf95507c9f2: fix(server): prevent SSD CLI secret mask spoofing (cherry-pick #29089 for 3.5) (#29130) (@argo-cd-cherry-pick-bot[bot])

📄 View Raw Release Notes (Original Developer Log)

## Quick Start ### Non-HA: ```shell kubectl create namespace argocd kubectl apply -n argocd --server-side --force-conflicts -f https://raw.githubusercontent.com/argoproj/argo-cd/v3.5.1/manifests/install.yaml ``` ### HA: ```shell kubectl create namespace argocd kubectl apply -n argocd --server-side --force-conflicts -f https://raw.githubusercontent.com/argoproj/argo-cd/v3.5.1/manifests/ha/install.yaml ``` ## Release Signatures and Provenance All Argo CD container images are signed by cosign. A Provenance is generated for container images and CLI binaries which meet the SLSA Level 3 specifications. See the [documentation](https://argo-cd.readthedocs.io/en/stable/operator-manual/signed-release-assets) on how to verify. ## Release Notes Blog Post For a detailed breakdown of the key changes and improvements in this release, check out the [official blog post](https://blog.argoproj.io/argo-cd-v3-0-release-candidate-a0b933f4e58f) ## Upgrading If upgrading from a different minor version, be sure to read the [upgrading](https://argo-cd.readthedocs.io/en/stable/operator-manual/upgrading/overview/) documentation. ## Changelog ### Bug fixes * 33f3bc59faeec96204cda3a5ae211be17d15f1ac: fix(appset): stop progressive sync reconciling in a tight loop (#27577) (#29139) (@himeshp) * d358e75b3539c3fc43eb2372317bde7a0d01c55f: fix(appset): verify terminating Applications against the API server (#29042) (#29138) (@himeshp) * ecf37373a9d3a72b259a73abfee7ce27226b960a: fix(controller): cherry-pick treat `timeout.reconciliation=0` as disabled soft expiry (#27683) (#29007) (@aali309) * 978fa65006565baaaf35894918fd661d610f5953: fix(controller): reuse server-side diff result when masking Secret data (#27858) (#29074) (@1ovsss) * f399c84f85fc4e3a19ac1e8314ff111493d26fee: fix(controller): use diff cache when timeout.reconciliation is disabled (cherry-pick #29073 for 3.5) (#29158) (@argo-cd-cherry-pick-bot[bot]) * 960bed7f2efcdc8b43fe392dd6d17cf95507c9f2: fix(server): prevent SSD CLI secret mask spoofing (cherry-pick #29089 for 3.5) (#29130) (@argo-cd-cherry-pick-bot[bot]) * 9f360f4953a1dc0f3474aa9c482d72366863ea33: fix(ssd): hide secret in last-applied-configuration annotation (#28989) (#29052) (@pjiang-dev) ### Other work * 109ca7ca71139e514114499d294a492e7910a965: chore: bump version to 3.5.1 on release-3.5 branch (#29165) (@github-actions[bot]) * b44fbbc2e040e303c18a69182fd5dbe2c36cfdf9: fix(manifest-generate-paths): Consistent gen manifest cache key (#28074 and #29037) (#29049) (@agaudreault) **Full Changelog**: https://github.com/argoproj/argo-cd/compare/v3.5.0...v3.5.1 <a href="https://argoproj.github.io/cd/"><img src="https://raw.githubusercontent.com/argoproj/argo-site/master/content/pages/cd/gitops-cd.png" width="25%" ></a>

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