リリース

Argo CD v3.3.12 is a maintenance release fixing sync state tracking, cluster observer locking, configuration parsing, and git repository depth handling—no breaking changes.

• securityDex authentication now handles special characters in passwords

  Dex password parsing previously failed if passwords contained dollar signs, potentially locking users out. If you use Dex for OIDC and recently added or updated passwords with special characters, upgrade to v3.3.12 immediately to restore access. Test Dex login after updating.

• enhancementFix PromotionStrategy stuck state if using Argo Rollouts

  If you run Argo CD with Argo Rollouts and use PromotionStrategy, applications may have remained stuck in Progressing after configuration reloads even when nothing changed. Update to v3.3.12 to resolve this. Check your application health status post-upgrade to confirm recovery.

Argo CD v3.3.11 is a routine patch release on the 3.3 branch, bundling six bug fixes and one dependency security update (CVE-2026-41240).

• securityPatch dompurify CVE in Argo CD UI

  This patch bumps redoc/dompurify to v3.4.0 in the UI to fix CVE-2026-41240. If you run the Argo CD UI, upgrade to v3.3.11 to close this XSS-related dependency vulnerability.

• enhancementFixes for controller startup race and nil pointer crash

  A race condition could raise an InvalidSpecError during application controller startup, and a nil pointer dereference existed in removeWebookMutation() from gitops-engine. Both are fixed here; upgrade if you've seen spurious spec errors or controller crashes on startup.

Argo CD 3.4.3 is a patch release fixing a UI XSS CVE (CVE-2026-41240 via dompurify), a controller startup race, a webhook nil-pointer crash, and several CLI/UI bugs.

• securityPatch CVE-2026-41240 in the UI (dompurify bump)

  dompurify was bumped to v3.4.0 to fix CVE-2026-41240. If you're running Argo CD 3.4.x with the web UI exposed — especially to less-trusted users — upgrade to 3.4.3 promptly. Check whether your current version is behind 3.4.3 and roll it out during your next maintenance window or sooner if the UI is internet-facing.

• enhancementFix startup race condition and nil-pointer crash in webhook mutation

  A race condition in application controller startup could trigger InvalidSpecError incorrectly, and a nil pointer dereference in removeWebhookMutation() could cause crashes. Both are fixed here. If you've seen spurious errors at controller startup or webhook-related panics, 3.4.3 addresses them directly.

• enhancement'app wait' no longer hangs when app is already synced

  'app wait' now returns immediately when the app is already in the desired state, instead of blocking. If you use 'app wait' in CI/CD pipelines or scripts as a sync gate, this means faster pipeline runs when apps are already healthy — no code changes needed, just upgrade.

Argo CD v3.3.10 is a patch release fixing a nil-pointer panic in permission validation, a log line UI overflow bug, and bumping Go to 1.25.9 to address CVEs.

• securityUpgrade immediately — Go 1.25.9 fixes CVEs in the runtime

  The Go runtime was bumped from a prior version to 1.25.9 specifically to resolve CVEs. The release notes don't enumerate the CVE IDs, but any patch that upgrades the runtime for security reasons on a stable branch deserves prompt action. If you're running 3.3.x, upgrade to 3.3.10 now rather than waiting for your next maintenance window.

• breakingServer-side diff now correctly hides secrets — verify diff outputs if you rely on them

  The fix to apply HideSecretData to server-side diff results means that previously exposed secret values in diff views will now be redacted. If any automation, alerting, or audit tooling parses diff output expecting raw secret values, it will break. Review your diff-dependent workflows before upgrading.

• enhancementNil APIResource panic fix prevents unexpected controller crashes

  The permission validator could panic when an APIResource was nil — a condition that can occur with certain custom or non-standard API groups. If you've seen intermittent ArgoCD controller restarts without clear cause, this is a likely culprit. Upgrade to 3.3.10 to stabilize those environments.

Argo CD v3.4.2 is a patch release fixing a panic in the permission validator, reverting a problematic revision update optimization, and patching secret data exposure in server-side diffs.

• securitySecret values could appear in diff output — patch now

  Server-side diff results for Secret resources were not having HideSecretData applied, meaning secret values could be exposed in diff views through the UI or API. If you use server-side apply or server-side diff previews, upgrade to 3.4.2 immediately. Audit your ArgoCD API access logs if you suspect exposure.

• breakingUpdateRevisionForPaths revert may re-introduce previous behavior

  The optimization that avoided unnecessary UpdateRevisionForPaths calls (merged in 3.4.x) caused regressions and has been reverted. If you were relying on that behavior for performance or correctness, expect the pre-fix behavior to return. Monitor sync operations after upgrading, especially for path-filtered applications.

• enhancementPermission validator panic fix improves stability

  A nil APIResource in the permission validator could crash the ArgoCD server process. This is now guarded. If you've seen unexpected pod restarts on the ArgoCD server, especially in environments with non-standard CRDs or API aggregation, this patch likely addresses it.

Argo CD 3.4.1 is the first 3.4 release (skipping 3.4.0), bringing a breaking cluster version format change for ApplicationSets, plus a large wave of bug fixes, performance improvements, and UI enhancements.

• securityAdd X-Frame-Options/CSP headers and JWT logout invalidation

  Two security fixes landed: Swagger UI endpoints now return X-Frame-Options and Content-Security-Policy headers (mitigates clickjacking), and JWT tokens are invalidated server-side on logout (prevents session reuse after logout). Both are passive — no config changes needed — but if you run Argo CD behind a reverse proxy that strips security headers, verify the headers reach clients after upgrading.

• breakingUpdate ApplicationSet cluster version labels before upgrading

  The kubernetes-version label format changed from Major.Minor (e.g., '1.29') to vMajor.Minor.Patch (e.g., 'v1.29.3') to match Helm 3.19.0. If you use ApplicationSet Cluster Generators with argocd.argoproj.io/auto-label-cluster-info, your existing cluster secrets carry the old format. After upgrading, update those secrets to use argocd.argoproj.io/kubernetes-version with the new format, or your cluster-version-based filters will stop matching. Check the 3.3-3.4 upgrade guide before rolling out.

• enhancementAppSet controller and repo-server performance improvements worth monitoring

  Several perf fixes shipped: optimized parentUIDToChildren data structure, reduced secret deep-copies in the controller, parallel batching in CLI server-side diff, and optimized repoLock on checkout. If you've been seeing slow reconciliation or high CPU in the appset controller on large clusters, this upgrade should show measurable improvement. Monitor controller CPU and reconciliation latency metrics after rollout.

Argo CD v3.1.16 is a minor patch fixing a server-side double-delete error and bumping the SonarQube scan action dependency.

• securityVerify cosign signatures after upgrading

  Every release is a good reminder to validate image provenance in your admission pipeline. Argo CD images meet SLSA Level 3 — if you're not yet enforcing signature verification at deploy time, now is a practical moment to wire that into your policy engine (e.g., Kyverno or OPA Gatekeeper).

• enhancementApply patch if double-delete errors are hitting your workflows

  If your GitOps pipelines or operators occasionally retry delete operations (e.g., during cascade deletes or reconciliation loops), the previous behavior could surface spurious errors that confused alerting or caused retries to fail loudly. This fix cleans that up. Upgrade is low-risk given the narrow scope of changes.

v3.3.9 is a focused patch addressing four bugs — including a panic in ApplicationSet DuckType Generator and a UI crash in pod logs — plus a Go version bump to resolve CVEs.

• securityUpgrade to patch Go-level CVEs

  The Go runtime was bumped specifically to resolve CVEs. The release notes don't enumerate the exact CVE IDs, but if you're running 3.3.x in production, upgrade to 3.3.9 now rather than waiting for your next maintenance window. All container images are cosign-signed and SLSA Level 3 provenance is available — verify signatures before deploying if your pipeline requires it.

• breakingApplicationSet DuckType Generator panic is now fixed — review affected ApplicationSets

  If you use DuckType Generators and have clusters with non-string label values, previous versions would silently panic. After upgrading, those ApplicationSets will now process correctly rather than crashing. Do a quick audit of your ApplicationSet resources post-upgrade to confirm they're reconciling as expected — you may see previously-failing sets suddenly become active.

• enhancementOCI metadata caching restored — expect reduced registry pressure

  The Redis cache for OCI metadata was broken, meaning every OCI source lookup was hitting the registry directly. With this fix, caching works again. If you use OCI-sourced ApplicationSets or Helm charts, you should see reduced latency and fewer registry requests after upgrading. No configuration change needed.

Argo CD v3.3.7 is a patch release fixing controller performance regressions, OIDC config handling, and several UI/security header issues.

• securitySwagger UI endpoints now have clickjacking protection — upgrade if exposed

  X-Frame-Options and Content-Security-Policy headers were missing from Swagger UI endpoints. If your Argo CD API server is reachable from browsers (even internally), those endpoints were frameable. Upgrade to 3.3.7 to close this. No config change needed post-upgrade.

• breakingOIDC auth may behave differently after upgrade if config was stale

  The fix ensures OIDC config reloads on server restart rather than using a cached/stale version. In practice this is a correctness fix, but if you've been working around stale OIDC behavior with manual pod restarts, verify SSO flows after upgrading to confirm expected behavior.

• enhancementUpgrade if you're seeing excessive reconciliation or controller CPU spikes

  Two separate fixes address controller overhead: the parentUIDToChildren data structure change reduces memory churn on large clusters, and the informer resync fix stops unnecessary app refreshes that inflate API server load. If your controller is burning CPU or you're seeing constant reconcile loops, this patch is worth prioritizing.

Argo CD v3.1.14 is a small patch fixing unnecessary app refreshes and a CI lockfile issue, plus a dependency bump for fast-xml-parser.

• securityfast-xml-parser bump closes potential parsing vulnerabilities

  The fast-xml-parser library was bumped three minor versions. These kinds of XML parser updates often address denial-of-service or entity expansion issues. While Argo CD's exposure surface for this library is limited to the UI, staying current here is straightforward — just upgrade and verify UI functionality in your staging environment.

• enhancementUpgrade if informer resync is flooding your refresh queue

  The fix for automatic refreshes triggered by informer resync and status updates is the real reason to pick up this patch. If you've been seeing excessive app refresh activity or high controller CPU load during resync windows, this addresses the root cause. Deploy this patch during your next maintenance window — it's low risk.

Argo CD v3.2.9 is a patch release fixing excessive refresh triggers, a UI rendering bug for OCI revisions, and a CI lockfile issue, plus a dependency bump for fast-xml-parser.

• securityfast-xml-parser bump addresses potential XML parsing issues in the UI

  fast-xml-parser was bumped from 4.5.3 to 4.5.6. While no specific CVE is called out in the release notes, staying current on XML parsing libraries in web UIs is prudent given their attack surface. If your Argo CD UI is exposed to untrusted users or external traffic, this upgrade is worth prioritizing.

• enhancementUpgrade if informer resync noise is causing excessive reconciliation

  The fix for unintended automatic refreshes from informer resync and status updates (#25290) is the most operationally impactful change here. If you've seen high reconciliation rates or unexplained sync activity in busy clusters, this patch directly addresses that. Upgrade to 3.2.9 and monitor your refresh/sync rate metrics post-upgrade.

• enhancementOCI users: revision metadata now renders correctly

  If your team uses OCI-based Helm charts or manifests and noticed the revision metadata panel was always blank, that was a guard clause bug — not a config problem. This release fixes it. No action needed beyond upgrading; the UI should display OCI revision info correctly afterward.

A targeted patch release fixing a gRPC CVE, a false-diff bug in app normalization, and a UI glitch in RollingSync — upgrade promptly for the security fix alone.

• securityPatch CVE-2026-33186 by upgrading to v3.2.8 now

  The grpc-go CVE-2026-33186 fix is the primary reason to move quickly on this release. If you're running any 3.2.x version, upgrade to 3.2.8. Verify your container images using cosign against the published provenance — the Argo CD docs cover the exact verification steps. Don't wait on this one.

• breakingCheck for spurious sync operations before and after upgrade

  The normalization diff bug could have been silently triggering syncs on apps that were actually in-sync. After upgrading, review your sync history for apps that synced frequently without visible config changes — those were likely false positives. The fix should stop them, but any automation or alerts built around sync frequency may need recalibration.

• enhancementRollingSync UI fix improves progressive delivery visibility

  If you use ApplicationSets with RollingSync and have ever wondered why a step appeared blank or unclear in the UI, this fix addresses that. No action needed beyond upgrading, but it's worth re-examining your RollingSync step configurations in the UI post-upgrade to confirm everything displays as expected.

Patch release fixing a gRPC CVE and a UI bug in RollingSync. Low operational risk, but the security fix warrants prompt upgrade.

• securityUpgrade now to mitigate CVE-2026-33186 in grpc-go

  CVE-2026-33186 affects the grpc-go library used by Argo CD's internal and external gRPC communication. The fix is a mitigation backport to the 3.1 branch. Any Argo CD 3.1.x instance prior to 3.1.13 is exposed. Upgrade to 3.1.13 promptly — this should be treated as a priority patch, not a routine update. After upgrading, verify image signatures with cosign against the published provenance if your supply chain policy requires it.

• securitylodash bumped to 4.17.23 — check if your own apps pin this version

  The lodash bump in the UI bundle closes known issues in 4.17.21/4.17.22. If your team also pins lodash in application code or CI pipelines referencing Argo CD's frontend assets, audit those pinned versions independently. This change only covers the Argo CD UI bundle itself.

• enhancementRollingSync UI fix helps diagnose misconfigured sync waves

  If you use ApplicationSets with RollingSync and label-based step matching, the previous UI would silently hide steps that matched no labels — making it hard to spot misconfigured rollout waves. The fix surfaces these unmatched steps visibly. After upgrading, review any RollingSync-heavy ApplicationSets to confirm step labels are actually matching the intended clusters or apps.

Argo CD 3.3.4 delivers critical bug fixes for token refresh handling and git-lfs support, plus enhanced security documentation - a maintenance release that improves operational stability.

• securityVerify signed release assets

  All container images now include cosign signatures and SLSA Level 3 provenance. Use the official verification documentation to validate your container images before deployment, particularly in security-sensitive environments.

• breakingReview token refresh configurations

  The token refresh fix resolves parsing errors that could affect component behavior. Check your existing token configurations and monitor for any authentication issues after upgrading, especially in multi-component setups.

• enhancementUpgrade for ppc64le architecture support

  If running on ppc64le systems, this release fixes git-lfs functionality that was previously broken due to missing checksums. Plan your upgrade to restore full git-lfs capabilities on these architectures.