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 ×

NATSv2.14.3Networking & MessagingJun 29, 2026

CHECK 3OTHER 42View full analysis

A maintenance release with a dependency and toolchain update, broad defect corrections, and behavior improvements across authentication, routing, monitoring, clustering, and JetStream. It also removes JSONP monitoring callbacks and addresses MQTT and authorization-related connection and permission handling.

Check if affected (3)

securityNats-Trace-Dest publish permission checks for leaf connections
Applies if you use Leaf connections.
securityMQTT subscribe deny rules on retained message and QoS replay paths
Applies if you use MQTT.
breakingThe JSONP callback support in monitoring endpoints, removed
Applies if you use JSONP callback support.

NATSv2.12.12Networking & MessagingJun 29, 2026

CHECK 1OTHER 45View full analysis

A maintenance release with dependency updates, operational behavior changes, and correctness fixes across General, MQTT, Monitoring, and JetStream. It also removes JSONP callback support from monitoring endpoints.

Check if affected (1)

breakingThe JSONP callback support in monitoring endpoints, removed
Applies if you use JSONP callback support.

Strimzi1.1.0Networking & MessagingJun 27, 2026

CHECK 3OTHER 21View full analysis

This release adds operator-facing configuration and feature capabilities while updating supported Apache Kafka versions and related integrations. It also changes TLS file handling for KafkaBridge and KafkaMirrorMaker2 and renames entity-operator healthcheck ports, so those areas may require attention.

Check if affected (3)

breakingSupport for Kafka 4.1.x removed
Applies if you use Kafka 4.1.x.
breakingPEM-based TLS files for KafkaBridge and KafkaMirrorMaker2
Applies if you use KafkaBridge or KafkaMirrorMaker2 with TLS authentication or a TLS truststore.
breakingEntity-operator healthcheck port names
Applies if you use entity-operator healthcheck ports.

Istio1.30.2Networking & MessagingJun 24, 2026

ACTION 12CHECK 5OTHER 7View full analysis

A maintenance release with a changed logging default, operator-facing additions and fixes, and a restriction on pilot-agent metric content types. It also includes Envoy security fixes covering denial-of-service, crashes, validation issues, memory exhaustion, and other vulnerabilities.

Action needed (12)

securityhighCVE-2026-47220 crash bug fix
The Envoy security update fixes the crash bug described by CVE-2026-47220.
securityhighCVE-2026-48044 memory exhaustion fix
The Envoy security update fixes the memory exhaustion vulnerability described by CVE-2026-48044.
securityhighCVE-2026-48042 JSON nesting-depth limit
The Envoy security update limits JSON nesting depth to 1000 through envoy.reloadable_features.limit_json_parser_nesting_depth.
securitymediumCVE-2026-47692 bug fix
The Envoy security update fixes the bug described by CVE-2026-47692.
securitymediumCVE-2026-47205 use-after-free crash fix
The Envoy security update fixes the use-after-free crash described by CVE-2026-47205.
securitymediumCVE-2026-48090 asynchronous token callback handling
The Envoy security update fixes a bug where the asynchronous token change callback could be triggered after the filter had been torn down.
securitymediumCVE-2026-47778 Subject Alternative Name validation
The Envoy security update fixes an issue where Envoy could fail to validate the Subject Alternative Name (SAN).
securitymediumCVE-2026-47204 crash and use-after-free fix
The Envoy security update fixes a crash or use-after-free described by CVE-2026-47204.
securitymediumCVE-2026-48497 query name length checking
The Envoy security update fixes sanity checking of the query name length.
securitymediumCVE-2026-47775 padding oracle
The Envoy security update addresses a padding oracle described by CVE-2026-47775.
securityGHSA-p7c7-7c47-pwch denial-of-service fix
The Envoy security update fixes the denial-of-service vulnerability described by GHSA-p7c7-7c47-pwch.
breakingWarn-level message logging
The message is now logged at warn level.

Check if affected (5)

securityhighCVE-2026-48743 HTTP/3 content-length validation
Applies if you use HTTP/3.
securitymediumCVE-2026-47207 ext_proc response handling
Applies if you use the ext_proc extension.
securitymediumCVE-2026-47221 HTTP 303 redirect handling
Applicability is not stated in the release notes.
+ 2 more on the release page

Envoyv1.38.3Networking & MessagingJun 23, 2026

ACTION 16CHECK 2View full analysis

A maintenance release with multiple disclosed security fixes and a security-related Wasmtime dependency update. It also removes the Intel DLB connection-balancer extension from all builds and disables TLS certificate compression by default.

Action needed (16)

securityhighThe com_github_wasmtime dependency update
The Wasmtime dependency com_github_wasmtime was updated to resolve CVE-2026-47261. The update ships in the WebAssembly build.
securityhighREQUESTED_SERVER_NAME crash, CVE-2026-47220
The REQUESTED_SERVER_NAME crash was corrected in Envoy. The change addresses CVE-2026-47220 and GHSA-j9wh-4qfm-wf2v.
securityhighzstd RLE zip bomb, CVE-2026-48044
The zstd RLE zip bomb issue was corrected in Envoy. The change addresses CVE-2026-48044 and GHSA-m3p9-47wh-88wg.
securityhighHighly nested JSON destructor stack overflow, CVE-2026-48042
The stack overflow in the destructor of highly nested JSON was corrected in Envoy. The change addresses CVE-2026-48042 and GHSA-f24p-rxw2-g6pv.
securityhighHTTP/3 to HTTP/1 request smuggling, CVE-2026-48743
The HTTP/3 to HTTP/1 request smuggling issue involving a headers-only request with a nonzero Content-Length was corrected in Envoy. The change addresses CVE-2026-48743 and GHSA-8phg-2h2q-jgxf.
securitymediumAuthz per route crash, CVE-2026-47205
The Authz per route crash was corrected in Envoy. The change addresses CVE-2026-47205 and GHSA-mvh9-767w-x47j.
securitymediumThe ext_proc response issue, CVE-2026-47207
The ext_proc response handling issue involving one gRPC message was corrected in Envoy. The change addresses CVE-2026-47207 and GHSA-68cv-hq5f-g6xv.
securitymediumRouter internal redirects crash, CVE-2026-47221
The router internal redirects crash was corrected in Envoy. The change addresses CVE-2026-47221 and GHSA-rcff-gw58-pjpr.
securitymediumOAuth2 code verifier padding oracle, CVE-2026-47775
The OAuth2 code verifier padding oracle issue was corrected in Envoy. The change addresses CVE-2026-47775 and GHSA-396h-jpq4-vc7p.
securitymediumThe grpc_stats filter segfault, CVE-2026-47204
The grpc_stats filter segfault on Connect protocol requests to direct_response routes was corrected in Envoy. The change addresses CVE-2026-47204 and GHSA-3jxh-8p6x-7pf6.
securitymediumPROXY Protocol v2 skipped TLVs, CVE-2026-47692
The PROXY Protocol v2 header generator issue involving skipped TLVs and attacker-controlled spillover into the upstream application stream was corrected in Envoy. The change addresses CVE-2026-47692 and GHSA-wh36-hm39-mm3r.
securitymediumEmbedded NUL in TLS SAN truncation, CVE-2026-47778
The embedded NUL issue in TLS SAN truncation that could cause an authorization bypass was corrected in Envoy. The change addresses CVE-2026-47778 and GHSA-f8x4-rw5x-f3r7.
securitymediumOAuth2 filter late token completion, CVE-2026-48090
The OAuth2 filter issue involving late asynchronous token completion after stream teardown was corrected in Envoy. The change addresses CVE-2026-48090 and GHSA-3cj2-c63f-q26f.
securitymediumDNS UDP filter abnormal process termination, CVE-2026-48497
The abnormal process termination in the DNS UDP filter was corrected in Envoy. The change addresses CVE-2026-48497 and GHSA-j6g2-wf95-q66q.
securitymediumThe TcpStatsdSink heap buffer overflow, CVE-2026-48706
The heap buffer overflow in TcpStatsdSink was corrected in Envoy. The change addresses CVE-2026-48706 and GHSA-7q3f-gwg7-j8g4.
securityHTTP/3 QPACK blocked decoding, GHSA-p7c7-7c47-pwch
The HTTP/3 stack issue involving QPACK blocked decoding was corrected in Envoy. The change addresses GHSA-p7c7-7c47-pwch.

Check if affected (2)

breakingThe envoy.network.connection_balance.dlb extension removal
Applies if you use envoy.network.connection_balance.dlb.
breakingThe envoy.reloadable_features.tls_certificate_compression_brotli default
Applies if you do not configure envoy.reloadable_features.tls_certificate_compression_brotli.

Envoyv1.37.5Networking & MessagingJun 23, 2026

ACTION 1CHECK 16View full analysis

A security-focused release with fixes for multiple Envoy components, extensions, protocols, and dependencies. It also disables the broken envoy.network.connection_balance.dlb contrib extension at the Bazel layer for all builds and platforms.

Action needed (1)

securityhighcom_github_wasmtime dependency update, CVE-2026-47261
The com_github_wasmtime dependency was bumped to resolve CVE-2026-47261.

Check if affected (16)

securityhighREQUESTED_SERVER_NAME crash fix, CVE-2026-47220
Applies if you configure REQUESTED_SERVER_NAME.
securityhighzstd RLE zip bomb fix, CVE-2026-48044
Applies if you depend on zstd.
securityhighHighly nested JSON destructor stack overflow fix, CVE-2026-48042
Applies if you use JSON.
+ 13 more on the release page

Envoyv1.36.9Networking & MessagingJun 23, 2026

ACTION 1CHECK 15View full analysis

A security-focused release with fixes for crashes, request handling, protocol processing, authentication, and parsing, plus a security-related wasm dependency update. The contrib extension envoy.network.connection_balance.dlb is disabled in all builds.

Action needed (1)

securityhighHighly nested JSON destructor stack overflow
The stack overflow in the destructor of highly nested JSON is corrected in connection with CVE-2026-48042 and GHSA-f24p-rxw2-g6pv.

Check if affected (15)

securityhighzstd RLE zip bomb correction
Applies if you use zstd.
securityhighHTTP/3 to HTTP/1 request smuggling
Applies if you use HTTP/3 and HTTP/1.
securityhighcom_github_wasmtime dependency update
Applies if you use wasm.
+ 12 more on the release page

Envoyv1.35.13Networking & MessagingJun 23, 2026

ACTION 1CHECK 14View full analysis

A security-focused maintenance release with fixes across filters, protocol handling, request processing, and JSON parsing. It also updates the Wasmtime dependency and disables the contrib extension envoy.network.connection_balance.dlb.

Action needed (1)

securityhighHighly nested JSON destructor stack overflow, corrected for CVE-2026-48042
This release corrects the stack overflow in the destructor of highly nested JSON described by CVE-2026-48042 and GHSA-f24p-rxw2-g6pv.

Check if affected (14)

securityhighzstd RLE zip bomb, corrected for CVE-2026-48044
Applies if you use zstd.
securityhighHTTP/3 headers-only content-length validation, corrected for CVE-2026-48743
Applies if you use HTTP/3.
securityhighcom_github_wasmtime dependency update for CVE-2026-47261
Applies if you use wasm.
+ 11 more on the release page

Strimzi1.0.1Networking & MessagingJun 17, 2026

ACTION 2CHECK 2View full analysis

A release focused on CRD compatibility and Entity Operator watching defaults, with fixes for disclosed security vulnerabilities. It affects deployments using older CRD APIs or configuring cross-namespace watching.

Action needed (2)

securityhighFix for CVE-2026-55225
The release fixes CVE-2026-55225, also identified as GHSA-mw9r-p8xp-wx96.
securitymediumFix for CVE-2026-55226
The release fixes CVE-2026-55226, also identified as GHSA-r427-j2h7-wv3m.

Check if affected (2)

breakingSupported CRD API versions narrowed
Applies if you use the v1beta2, v1beta1, or v1alpha1 CRD APIs.
breakingEntity Operator cross-namespace watching default
Applies if you configure STRIMZI_ENTITY_OPERATOR_WATCHED_NAMESPACE_ENABLED or watchedNamespace.

Ciliumv1.19.5Networking & MessagingJun 16, 2026

CHECK 3OTHER 48View full analysis

A maintenance-focused release with correctness fixes, dependency updates, operator troubleshooting improvements, and a security fix for a namespace-bypass issue. It also removes obsolete Helm settings, so configurations using those values need review.

Check if affected (3)

securityWildcard namespace bypass for selectorless ipBlock rules, fixed
Applies if you configure ipBlock.
breakingThe loadBalancer.standalone Helm option, removed
Applies if you configure loadBalancer.standalone.
breakingThe l2podAnnouncements.interface Helm value, replaced by l2podAnnouncements.interfacePattern
Applies if you configure l2podAnnouncements.interface and enable L2 pod announcements.

Linkerdedge-26.6.2Networking & MessagingJun 16, 2026

CHECK 1OTHER 18View full analysis

A release with narrower ExternalWorkloads endpoint behavior, annotation support for upcoming load-balancing features, policy and profile fixes, dependency updates, and new load-biasing functionality. This release is explicitly not recommended in favor of edge-26.6.3.

Check if affected (1)

breakingNamespace-restricted ExternalWorkloads endpoints
Applies if you use ExternalWorkloads.

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.

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.

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

Browse by month