Releases

AI-analyzed release notes for CNCF graduated and incubating projects.

URGENCY

All Action needed Check if affected Plan ahead

KIND

All Security Breaking Deprecated

Category

All AI & ML CI/CD & App Delivery Kubernetes Core Networking & Messaging Observability Orchestration & Management Provisioning & Runtime Security Storage & Data

Jun 2026Clear ×

Daprv1.18.0Orchestration & ManagementJun 10, 2026

ACTION 8CHECK 6PLAN 1OTHER 108View full analysis

A substantial operator-facing release adds workflow and MCP capabilities alongside control-plane, API, component, and lifecycle changes. It also includes security fixes, dependency and default updates, and compatibility constraints that affect upgrade planning and configuration review.

Action needed (8)

securitymediumThe golang.org/x/image dependency update for GO-2026-4962
golang.org/x/image is updated to v0.39.0 for GO-2026-4962.
securityThe durabletask-go and pgx dependency updates
durabletask-go is updated to v0.12.1, and pgx is updated as part of the vulnerability fixes.
breakingThe WorkflowsRemoteActivityReminder default, enabled
WorkflowsRemoteActivityReminder is enabled by default. Cross-app workflow activity results are delivered through Scheduler reminders unless the setting is changed.
breakingThe HotReload default, enabled
HotReload is enabled by default for Components, Subscriptions, MCPServers, Configurations, HTTPEndpoints, Resiliencies, and WorkflowAccessPolicies.
breakingSidecar probe defaults
Sidecar probe defaults now give liveness more time before a kubelet restart, at about 230 seconds, while readiness responds more quickly.
breakingThe HotReload default, enabled in v1.18
HotReload is enabled by default in v1.18.
breakingLiveness and readiness probe defaults
The default liveness probe is widened, and the readiness probe default is tightened.
breakingChanged sidecar probe defaults
Sidecar probe defaults now set liveness to be more lenient, at about 230 seconds before a kubelet restart, and readiness to be tighter, at about 3 seconds for the control plane and 5 seconds for daprd.

Check if affected (6)

securityService invocation path traversal ACL bypass fix
Applies if you use service invocation.
breakingThe MCPServerResource and WorkflowAccessPolicy feature gates, removed
Applies if you configure the MCPServerResource or WorkflowAccessPolicy feature gates.
breakingThe Sentry Ed25519 workload identity key rollback constraint
Applicability is not stated in the release notes.
+ 3 more on the release page

Plan ahead (1)

deprecatedThe ScheduleJobAlpha1 alpha RPCs, deprecated
Applies if you use ScheduleJobAlpha1.

NATSv2.12.11Networking & MessagingJun 9, 2026

CHECK 3OTHER 18View full analysis

A feature and behavior release for JetStream and server operations, with new capabilities alongside changed defaults and downgrade constraints. Operators using strict JetStream requests, insecure TLS cipher suites, or new v2.12 features should review the changed behavior; the release also fixes a JetStream regression.

Check if affected (3)

breakingInsecure TLS cipher suite default
Applies if you enable allow_insecure_cipher_suites.
breakingJetStream strict mode default
Applies if you use JetStream.
breakingDowngrade compatibility for new v2.12 features
Applies if you use new v2.12 features.

CoreDNSv1.14.4Kubernetes CoreJun 9, 2026

CHECK 1OTHER 20View full analysis

A release with new plugin capabilities, stricter validation, DNS and cache behavior changes, expanded platform support, and malformed-input handling fixes. The HTTP/3 request header limit is narrowed for DoH3.

Check if affected (1)

breakingBound DoH3 HTTP/3 request header size
Applies if you use DoH3.

gRPCv1.81.1Networking & MessagingJun 8, 2026

CHECK 1OTHER 3View full analysis

A maintenance release with fixes for correctness defects and a change to the default availability of the error_flatten experiment. It also includes an internal implementation change with no operator-facing impact.

Check if affected (1)

breakingThe error_flatten experiment, enabled in OSS
Applicability is not stated in the release notes.

Cortexv1.21.1ObservabilityJun 5, 2026

CHECK 3OTHER 7View full analysis

A maintenance release with operator-facing security fixes and configuration changes across ingestion, distribution, and status pages. It also includes fixes for request handling, authentication, configuration exposure, gossip limits, and client and runtime panics.

Check if affected (3)

securityStored XSS protection in Alertmanager and Store Gateway status pages
Applies if you run Alertmanager or Store Gateway.
securityWrappedHistogram native histogram size limit
Applies if you use native histograms.
breakingDecompressed gzip output limit for ParseProtoReader and OTLP ingestion
Applies if you use the OTLP ingestion path.

Istio1.30.1Networking & MessagingJun 4, 2026

ACTION 1CHECK 1OTHER 15View full analysis

A maintenance release with an Envoy denial-of-service security fix, defect corrections, new operator-facing capabilities, a dependency update, and removal of a feature-gate guard. The security fix addresses disclosed advisory CVE-2026-47774.

Action needed (1)

securityhighCVE-2026-47774 Envoy denial-of-service fix
The fix addresses CVE-2026-47774 in Envoy, where specially crafted HTTP/2 requests could exhaust process memory because decoded header size was not fully limited during request validation.

Check if affected (1)

breakingPILOT_ENABLE_ALPHA_GATEWAY_API guard removed from ListenerSet
Applies if you use the ListenerSet API.

Envoyv1.38.1Networking & MessagingJun 4, 2026

ACTION 1CHECK 4OTHER 2View full analysis

A maintenance release with HTTP/2 protections, an nghttp2 patch, and an OAuth2 HMAC verification fix. It also changes router response-body output and EDS batch load-balancer rebuild defaults, while the release notes include crash fixes in OAuth2 token-cookie decryption and dynamic HTTP filters.

Action needed (1)

securityhighnghttp2 patch for CVE-2026-27135
The nghttp2 dependency includes the patch for CVE-2026-27135. The patched dependency ships in v1.38.1.

Check if affected (4)

securityhighHTTP/2 header-limit enforcement and cookie accounting
Applies if you use HTTP/2 and do not enable envoy.reloadable_features.http2_include_cookies_in_limits.
securityOAuth2 HMAC verification timing side-channel fix
Applies if you use oauth2.
breakingRouter transport-failure reason response body
Applies if you use the router and do not enable envoy.reloadable_features.hide_transport_failure_reason_in_response_body.
+ 1 more on the release page

Keycloak26.6.3SecurityJun 4, 2026

ACTION 2CHECK 15OTHER 30View full analysis

A security-focused maintenance release with fixes spanning OIDC, authorization and account APIs, identity features, federation, WebAuthn, SAML, Netty, and lodash. It also updates dependencies and adds startup and SPI behavior alongside numerous correctness fixes.

Action needed (2)

securityhighCVE-2026-4800 lodash code injection
CVE-2026-4800 is addressed in the account UI, where lodash was vulnerable to code injection.
securitymediumCVE-2026-42581 Netty HTTP/1.0 smuggling sanitization
CVE-2026-42581 is addressed in Netty, correcting HTTP/1.0 TE and CL coexistence that bypassed smuggling sanitization.

Check if affected (15)

securitymediumCVE-2026-7500 account API access control
Applies if you use account/api.
securitymediumCVE-2026-8922 OIDC token introspection notBefore handling
Applies if you use oidc.
securitymediumCVE-2026-8830 server-side WebAuthn validation
Applies if you use authentication/webauthn.
+ 12 more on the release page

Envoyv1.37.3Networking & MessagingJun 4, 2026

ACTION 1CHECK 2OTHER 2View full analysis

A maintenance release focused on security and correctness fixes. The remaining heading-only items have no operator-facing changes.

Action needed (1)

securityhighnghttp2 CVE-2026-27135 patch
The nghttp2 CVE-2026-27135 patch is applied in the release.

Check if affected (2)

securityhighHTTP/2 header list limits and cookie accounting
Applies if you use HTTP/2.
securityOAuth2 HMAC verification timing
Applies if you use oauth2.

Envoyv1.36.7Networking & MessagingJun 4, 2026

ACTION 1CHECK 2OTHER 2View full analysis

Envoy v1.36.7 is a security-focused update with changes to HTTP/2 handling and OAuth2 authentication. It also includes an nghttp2 security patch, so deployments using these components are directly affected.

Action needed (1)

securityhighThe nghttp2 CVE-2026-27135 patch
Envoy v1.36.7 applies the nghttp2 patch for CVE-2026-27135 in its HTTP/2 handling.

Check if affected (2)

securityhighHTTP/2 header-limit enforcement and cookie accounting
Applies if you use HTTP/2 with configured header list or request-header limits.
securityOAuth2 HMAC verification timing side-channel fix
Applies if you use the OAuth2 filter.

Envoyv1.35.11Networking & MessagingJun 3, 2026

ACTION 1CHECK 2OTHER 4View full analysis

Envoy v1.35.11 is a security-focused release with fixes in HTTP/2, OAuth2, and nghttp2. It also includes ordinary bug fixes and new statistics capabilities, while the security changes are the ones that require upgrading.

Action needed (1)

securityhighThe nghttp2 CVE-2026-27135 patch
Envoy v1.35.11 applies the nghttp2 patch for CVE-2026-27135.

Check if affected (2)

securityhighHTTP/2 header limits and cookie accounting
Applies if you use HTTP/2 request header limits.
securityOAuth2 HMAC verification timing protection
Applies if you use OAuth2 HMAC verification.

Rookv1.20.0Storage & DataJun 2, 2026

CHECK 2OTHER 8View full analysis

A breaking release for CSI configuration also changes unused CRUSH rule handling and supported Kubernetes versions. It adds storage and object-store capabilities, including SSE-S3 with Vault Agent authentication, object-store account management, and encrypted OSD disk expansion.

Check if affected (2)

breakingCeph CSI operator for driver settings
Applies if you configure CSI driver settings.
breakingROOK_DELETE_UNUSED_CRUSH_RULES default
Applies if the Ceph mgr is running.

Longhornv1.12.0Storage & DataJun 2, 2026

CHECK 5OTHER 111View full analysis

A broad maintenance and feature release combines bug fixes with new capabilities, configuration options, and platform support. It also changes defaults, tightens operational constraints, and removes V2 Backing Images.

Check if affected (5)

breakingV2 Backing Images removal
Applies if you use V2 Backing Images.
breakingThe data-engine-cpu-mask default, changed
Applies if you do not configure data-engine-cpu-mask.
breakingLive migration constraint for older CLI API versions
Applies if you use an engine image with a CLI API version older than 12.
+ 2 more on the release page

KEDAv2.20.0Orchestration & ManagementJun 1, 2026

CHECK 7PLAN 1OTHER 70View full analysis

This release adds scalers, configuration options, metrics, authentication modes, and compatibility improvements. Operators with custom RBAC need to account for the Kubernetes events API migration, and users of removed scaler settings need to update their configurations.

Check if affected (7)

securityCredential headers on cross-host redirects and HTTPS downgrades
Applicability is not stated in the release notes.
breakingScaledObject name length validation
Applies when a ScaledObject name exceeds 63 characters.
breakingPositive unprocessedEventThreshold values
Applies if you configure a non-positive unprocessedEventThreshold.
+ 4 more on the release page

Plan ahead (1)

deprecatedThe buildId, selectAllActive, and selectUnversioned settings, deprecated
Applies if you configure buildId, selectAllActive, or selectUnversioned.

Limav2.1.2Kubernetes CoreJun 1, 2026

CHECK 1PLAN 1OTHER 34View full analysis

A feature and maintenance release with CLI and template changes, QEMU behavior updates, and fixes across drivers, hostagent, shell, and guest support. It also includes a deprecation, while no security advisories or explicitly described vulnerabilities are present.

Check if affected (1)

breakingQEMU 2MB OVMF images dropped by openSUSE
Applicability is not stated in the release notes.

Plan ahead (1)

deprecatedThe _LIMA_QEMU_UEFI_IN_BIOS flag, deprecated
Applies if you configure _LIMA_QEMU_UEFI_IN_BIOS.

Volcanov1.15.0Orchestration & ManagementJun 1, 2026

ACTION 4CHECK 2OTHER 83View full analysis

A feature and operational-hardening release that adds alpha scheduling capabilities, new scheduler and Helm configuration, and fixes scheduler and integration stability issues. Operators should review Kubernetes and DRA compatibility requirements, the changed DRA default, and the disclosed denial-of-service and Prometheus security fixes.

Action needed (4)

securitymediumPrometheus dependency update for GHSA-vffh-x6r8-xx99
Updates github.com/prometheus/prometheus to address stored XSS advisory GHSA-vffh-x6r8-xx99.
securitymediumAdmission webhook request body limits
The admission webhook now limits request bodies, fixing the denial-of-service risk identified by CVE-2026-44247 and GHSA-8wxp-xxp2-rcgx.
breakingDRA scheduling integration default
DRA scheduling integration is enabled by default.
breakingDRA scheduling integration default behavior
DRA scheduling integration is enabled by default to align with Kubernetes 1.34 and later behavior. Set predicate.DynamicResourceAllocationEnable to false to disable it.

Check if affected (2)

breakingOpt-in SchedulingGatesQueueAdmission
Applies if you enable SchedulingGatesQueueAdmission.
breakingOpt-in gang-aware preemption and reclamation
Applies if you configure gangPreempt and gangReclaim and do not configure preempt or reclaim.

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