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

Prometheusv3.14.0ObservabilityAug 18, 2026

ACTION 1CHECK 1PLAN 1OTHER 39View full analysis

A maintenance release with an API deprecation, operator-visible removals and default changes, new capabilities, performance improvements, and correctness fixes across discovery, PromQL, TSDB, and other components. No security advisories or explicitly described security vulnerabilities are included.

Action needed (1)

breakingDefault support for PromQL duration expressions
Duration expressions are enabled by default in PromQL. The promql-duration-expr feature flag is now a no-op.

Check if affected (1)

breakingThe __meta_hetzner_datacenter label, removed
Applies if you use hcloud targets.

Plan ahead (1)

deprecatedThe stats query parameter, deprecated for other valuesremoval date not announced
Applies if you set stats to a value other than true or all.

Chaos Meshv2.8.4ObservabilityAug 18, 2026

OTHER 5View full analysis

A maintenance release with fixes to operator-visible Dashboard behavior and Helm chart rendering. The changes address Dashboard serving, workflow schedule details, authentication, token controls, and extra-object template rendering.

OpenTelemetryv0.159.0ObservabilityAug 17, 2026

CHECK 2OTHER 6View full analysis

A release that adds exporter queue batching controls, changes exporter and scraper metric behavior, and updates public API field shapes. Schema-based configuration migrations are also included, with no security advisories or security fixes disclosed.

Check if affected (2)

breakingThe confighttp.ServerConfig field shape in Config
Applies if you use extension/zpages.
breakingThe configauth.Config field shape in AuthConfig
Applies if you use configauth.Config.

OpenCostv1.121.1ObservabilityAug 5, 2026

OTHER 5View full analysis

OpenCost v1.121.1 adds opt-in Athena query-result reuse configuration and NAT gateway cost metrics to OpenCost scrapes, and updates the Kubernetes dependency to k8s.io/apimachinery 0.36.3. Athena result reuse applies only to query engine v3, has no effect on v2 workgroups, and AWS limits MaxAgeInMinutes to 10080 minutes. No security advisories or security fixes are disclosed.

OpenTelemetryv0.158.0ObservabilityAug 4, 2026

CHECK 1OTHER 9View full analysis

OpenTelemetry v0.158.0 adds a replacement processor and configuration-schema capabilities, along with changes to component maturity and several defect corrections. It also removes the pkg/xconfmap validation API in favor of symbols in confmap.

Check if affected (1)

breakingThe pkg/xconfmap validation symbols, renamed
Applies if you use pkg/xconfmap's Validator or Validate symbols.

Thanosv0.42.4ObservabilityJul 30, 2026

View full analysis

Thanos v0.42.4 contains no described operator-facing changes in the supplied release information. The available note is a duplicate mention.

Prometheusv3.13.2ObservabilityJul 30, 2026

ACTION 2OTHER 2View full analysis

Prometheus v3.13.2 updates dependencies for two disclosed vulnerabilities and includes related transitive dependency upgrades. It also fixes a PromQL SIGBUS crash when the data disk is full.

Action needed (2)

securityhighgolang.org/x/text update for CVE-2026-56852
golang.org/x/text updates from v0.38.0 to v0.39.0 in Prometheus v3.13.2 for CVE-2026-56852.
securityhighgoogle.golang.org/grpc update for GHSA-hrxh-6v49-42gf
google.golang.org/grpc updates from v1.81.1 to v1.82.1 in Prometheus v3.13.2 for GHSA-hrxh-6v49-42gf.

Thanosv0.42.3ObservabilityJul 29, 2026

OTHER 1View full analysis

This release contains a receive shutdown regression correction. Blocks are uploaded before TSDB shutdown completes, preserving upload behavior during shutdown.

OpenTelemetryv0.157.0ObservabilityJul 21, 2026

CHECK 1PLAN 1OTHER 11View full analysis

This release adds configuration and feature-gate capabilities, corrects defects, changes histogram bucket values, and introduces the configstorage module. It also removes or deprecates API symbols, with no security issues or advisories identified.

Check if affected (1)

breakingThe BalancerName function, removed
Applies if you use BalancerName.

Plan ahead (1)

deprecatedThe WithForceUnmarshaler option, deprecated
Applies if you use WithForceUnmarshaler.

OpenCostv1.121.0ObservabilityJul 20, 2026

CHECK 1OTHER 14View full analysis

This release combines new cost data and collection capabilities with operational updates. Endpoint access defaults change, and the release includes corrections across pricing, pagination, request handling, providers, and serialization.

Check if affected (1)

breakingEndpoint defaults, deactivated without an admin token
Applies if you use endpoints without setting an admin token.

Jaegerv2.20.0ObservabilityJul 20, 2026

ACTION 1CHECK 3PLAN 1OTHER 27View full analysis

A release with backend compatibility removals, forced migrations, new configuration and CLI capabilities, and correctness fixes across storage, extensions, and related components. It does not disclose security advisories or security-specific flaws.

Action needed (1)

breakingTemplate creation through esclient
Template creation moves to esclient, and legacy mapping rendering is retired.

Check if affected (3)

breakingSupport for elasticsearch v6, removed
Applies if you use elasticsearch v6.
breakingThe jaegermcp extension, merged into jaegerquery
Applies if you use the jaegermcp extension.
breakingExpired stable feature gates, removed
Applicability is not stated in the release notes.

Plan ahead (1)

deprecatedThe legacy flag, deprecated
Applies if you use legacy flag.

Thanosv0.42.2ObservabilityJul 17, 2026

View full analysis

Thanos v0.42.2 contains no reported operator-facing changes. There are no release-note updates that affect configuration, operation, or user-visible behavior.

Thanosv0.42.1ObservabilityJul 16, 2026

OTHER 1View full analysis

This release corrects overly small timeouts in the Receiver's Shipper component. The available release information does not include a recorded change item to describe in more detail.

Litmus3.31.0ObservabilityJul 15, 2026

ACTION 1OTHER 9View full analysis

Release 3.31.0 contains a dependency update addressing vulnerabilities in graphql/server. It also includes correctness fixes across probes, GraphQL, authentication, infrastructure, and experiment handling.

Action needed (1)

securityDependencies in graphql/server updated
Dependencies in graphql/server are updated to fix vulnerabilities. The update ships in Release 3.31.0.

Prometheusv3.13.1ObservabilityJul 10, 2026

OTHER 1View full analysis

Prometheus v3.13.1 is a focused bug-fix release. It corrects a TSDB head-chunk cache defect that could affect range-query results after head-chunk truncation.

Prometheusv3.5.5ObservabilityJul 9, 2026

ACTION 1OTHER 1View full analysis

Prometheus v3.5.5 includes a Go 1.25.12 toolchain change and a disclosed security fix in the UI. The security fix concerns the sanitize-html dependency and CVE-2026-53606.

Action needed (1)

securitymediumThe sanitize-html dependency update for CVE-2026-53606
The Prometheus UI updates sanitize-html to v2.17.5 to fix CVE-2026-53606.

Thanosv0.42.0ObservabilityJul 8, 2026

ACTION 1CHECK 4OTHER 19View full analysis

A release with security corrections, breaking configuration removals, and an output-field rename that may require operator or log-collector changes. It also adds TLS and cache configuration, query and tracing changes, and defect fixes across several Thanos components.

Action needed (1)

securitycriticalthanos-community/grpc-go fork update for CVE-2026-33186
The thanos-community/grpc-go fork is bumped to fix CVE-2026-33186, an authorization bypass via malformed :path headers.

Check if affected (4)

securityReceive tenant ID validation
Applies if you run Receive.
breakingQuery-Frontend time_taken field renamed to time_taken_ms
Applies if you run Query-Frontend.
breaking--shipper.ignore-unequal-block-size flag removed
Applies if you configure --shipper.ignore-unequal-block-size.
+ 1 more on the release page

OpenTelemetryv0.156.0ObservabilityJul 7, 2026

OTHER 13View full analysis

OpenTelemetry v0.156.0 adds mdatagen and memory-limiter capabilities, changes generated configuration APIs, and corrects runtime and API defects. No security advisories or security-specific fixes are disclosed.

Prometheusv3.13.0ObservabilityJul 1, 2026

ACTION 2CHECK 2OTHER 37View full analysis

A long-term support release with security-related dependency updates, PromQL changes, new APIs and configuration controls, and bug fixes. It also replaces a shipped license artifact and includes performance improvements.

Action needed (2)

securitycriticalThe sanitize-html dependency update
The UI updates sanitize-html to address a cross-site scripting vulnerability, identified as CVE-2026-44990.
breakingThe third-party license artifact
Third-party npm dependency licenses are embedded in the Prometheus binary and served at /assets/third-party-licenses.txt. This replaces the npm_licenses.tar.bz2 archive previously shipped in release tarballs and container images.

Check if affected (2)

securitymediumRedirect credential forwarding
Applies if you use scraping, remote read/write, alerting, or service discovery.
breakingPromQL duration-expression function names
Applies if you enable experimental-duration-expr and use min() and max().

OpenCostv1.120.4ObservabilityJun 25, 2026

OTHER 14View full analysis

OpenCost v1.120.4 is a maintenance release with operator-facing fixes and updates to configuration, tooling, provider integrations, and runtime behavior. No security advisories or explicit security vulnerabilities are disclosed.

Fluentdv1.19.3ObservabilityJun 25, 2026

CHECK 2OTHER 11View full analysis

A maintenance release with bug fixes, behavior changes, and two operator-visible default changes. It also updates a runtime dependency and tightens validation and payload handling; no security vulnerability or advisory is explicitly identified.

Check if affected (2)

breakingThe in_monitor_agent visibility default
Applies if in_monitor_agent runs.
breakingThe in_debug_agent local-machine default
Applies if in_debug_agent runs.

OpenTelemetryv0.155.0ObservabilityJun 23, 2026

CHECK 9PLAN 1OTHER 10View full analysis

A release that removes stabilized feature gates, updates processor metric names, and changes service configuration APIs. It also adds schema and metadata tooling capabilities and fixes generator defects.

Check if affected (9)

breakingThe confightp.framedSnappy feature gate, removed
Applies if you use confightp.framedSnappy.
breakingThe configoptional.AddEnabledField feature gate, removed
Applies if you use configoptional.AddEnabledField.
breakingThe confmap.newExpandedValueSanitizer feature gate, removed
Applies if you use confmap.newExpandedValueSanitizer.
+ 6 more on the release page

Plan ahead (1)

deprecatedService configuration API deprecations
Applies if you use service.Settings.CollectorConf or extensioncapabilities.ConfigWatcher.

Prometheusv3.5.4ObservabilityJun 17, 2026

ACTION 2CHECK 1OTHER 1View full analysis

Prometheus v3.5.4 is primarily a security maintenance release, with a fix for plaintext secret exposure and dependency updates addressing reported advisories. It also adds publication of container images to the GitHub Container Registry at ghcr.io.

Action needed (2)

securitycriticalgolang.org/x/net and OpenTelemetry dependency updates
The golang.org/x/net dependency is updated to v0.55.0, and OpenTelemetry to v1.43.0. These updates address reported advisories GO-2026-5026, GO-2026-4918, and GO-2026-4985.
securityPatched UI dependency versions
The UI dependencies react-router-dom, vitest, vite, and postcss are updated to patched versions to resolve security advisories.

Check if affected (1)

securityPlaintext secret exposure via /-/config corrected
Applies if you access the /-/config endpoint.

Litmus3.30.0ObservabilityJun 17, 2026

OTHER 7View full analysis

Litmus 3.30.0 adds installation charts and an exposed metrics port, while correcting GraphQL configuration and experiment creation behavior. It also tightens an RBAC operation and updates Docker base images and Go dependencies.

Chaos Meshv2.8.3ObservabilityJun 10, 2026

ACTION 2OTHER 1View full analysis

A security-focused maintenance release includes undisclosed container-image CVE fixes and updates image components. It also corrects NetworkChaos recovery for targets in CrashLoopBackOff by falling back to the sandbox (pause) container PID for network namespace operations.

Action needed (2)

securityGo toolchain and containerd upgrades
The Go toolchain (1.25.11) and containerd (1.7.32) were upgraded in the container images.
securitymemStress rebuild and headless JRE for chaos-daemon
The memStress helper was rebuilt with the modern Go toolchain (v0.3.1), and the chaos-daemon image switched to a headless JRE.

OpenTelemetryv0.154.0ObservabilityJun 8, 2026

OTHER 5View full analysis

This is a maintenance release centered on configuration and generated-code behavior. It also changes an existing builder flag's effect on module regeneration and addresses runtime and validation issues.

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.

Jaegerv2.19.0ObservabilityJun 3, 2026

ACTION 1OTHER 15View full analysis

This release adds API and storage capabilities, updates API query naming and defaults, and includes correctness fixes. No security advisories or security-specific fixes are disclosed.

Action needed (1)

breakingThe searchdepth default in the trace-summaries endpoint
The default for searchdepth changed in the trace-summaries endpoint.

OpenCostv1.120.3ObservabilityMay 29, 2026

ACTION 1CHECK 1OTHER 51View full analysis

A maintenance release with dependency updates, correctness fixes, and new cloud and query capabilities. Configuration and output behavior also change, along with a Go dependency upgrade for GHSA-xmrv-pmrh-hhx2 and CVE-2026-34986.

Action needed (1)

securityhighGo dependency upgrades for GHSA-xmrv-pmrh-hhx2 and CVE-2026-34986
Go dependencies are upgraded for GHSA-xmrv-pmrh-hhx2 and CVE-2026-34986.

Check if affected (1)

breakingThe MCP_SERVER_ENABLED default is false
Applies if you do not configure MCP_SERVER_ENABLED.

Prometheusv3.12.0ObservabilityMay 28, 2026

ACTION 1CHECK 3OTHER 45View full analysis

A feature and maintenance release with new operator-facing APIs, discovery integrations, feature flags, configuration options, and UI capabilities. It also addresses disclosed security issues, correctness and performance problems, and validation or constraint behavior.

Action needed (1)

breakingConcurrent fgprof profile rejection
The API rejects concurrent fgprof profiles.

Check if affected (3)

securityRemote Write decoded-length constraint
Applies if you use Remote Write.
securityPlaintext secret exposure in STACKIT SD
Applies if you use STACKIT SD.
breakingDecompressed body-size limit for OTLP write requests
Applies if you use OTLP.

OpenTelemetryv0.153.0ObservabilityMay 25, 2026

CHECK 3OTHER 14View full analysis

This release updates configuration and metadata handling, with new schema and configuration capabilities and several API and feature-gate maturity changes. It also fixes Snappy memory corruption and fatal errors.

Check if affected (3)

breakingThe pdata.useCustomProtoEncoding feature gate, removed
Applies if you use pdata.useCustomProtoEncoding.
breakingDefault reaggregation_enabled behavior
Applies if you run cmd/mdatagen.
breakingStricter feature_gates validation
Applies if you configure feature_gates in metadata.yaml.

OpenTelemetryv0.152.1ObservabilityMay 19, 2026

CHECK 2PLAN 1OTHER 7View full analysis

A maintenance release that adds exporter in-flight request monitoring and configuration-validation APIs while correcting runtime and configuration behavior. It also changes Prometheus telemetry defaults for explicitly configured metrics and deprecates older validation APIs.

Check if affected (2)

breakingThe max_request_body_size limit for snappy requests
Applies if you configure max_request_body_size.
breakingPrometheus exporter defaults for explicitly configured telemetry
Applies if you configure the telemetry metrics section.

Plan ahead (1)

deprecatedThe xconfmap.Validator and confmap.Validate APIs
Applies if you use xconfmap.Validator or confmap.Validate.

OpenCostv1.120.2ObservabilityMay 18, 2026

ACTION 1CHECK 2OTHER 40View full analysis

A maintenance release with dependency updates, operator-visible configuration and behavior changes, new integrations and capabilities, and correctness fixes. It also includes an explicitly disclosed security-related Go dependency upgrade.

Action needed (1)

securityhighGo dependency upgrades for GHSA-xmrv-pmrh-hhx2 and CVE-2026-34986
Go dependencies were upgraded to address GHSA-xmrv-pmrh-hhx2 and CVE-2026-34986.

Check if affected (2)

breakingThe provider config source, changed
Applies if you configure provider config.
breakingThe MCP_SERVER_ENABLED default, changed to false
Applies if you use the MCP server.

Litmus3.29.0ObservabilityMay 18, 2026

ACTION 1OTHER 7View full analysis

Litmus 3.29.0 includes operator-facing changes across dependencies and platform behavior. This release includes a google.golang.org/grpc update to v1.79.3 for CVE-2026-33186.

Action needed (1)

securitycriticalThe google.golang.org/grpc dependency, updated for CVE-2026-33186
The release updates google.golang.org/grpc to v1.79.3. The dependency update addresses CVE-2026-33186 in Litmus 3.29.0.

Jaegerv2.18.0ObservabilityMay 13, 2026

ACTION 2OTHER 23View full analysis

A release with breaking removals, API and metric changes, bug corrections, and experimental capabilities. It also adds storage, MCP, UI, and tracing functionality, with no security advisories or security-specific fixes disclosed.

Action needed (2)

breakingThe min step api in metricstore, removed
The min step api was removed from metricstore in this release.
breakingThe non-standard health MCP tool, removed
The non-standard health MCP tool was removed from jaegermcp in this release.

OpenTelemetryv0.152.0ObservabilityMay 11, 2026

PLAN 1OTHER 10View full analysis

OpenTelemetry v0.152.0 adds exporter observability and configuration/API capabilities while correcting bugs in request handling, telemetry, and value formatting. It also deprecates older configuration validation APIs in favor of the confmap APIs.

Plan ahead (1)

deprecatedThe xconfmap.Validator and confmap.Validate APIs, deprecated
Applies if you use xconfmap.Validator or the deprecated confmap.Validate API for configuration validation.

OpenTelemetryv0.151.0ObservabilityApr 28, 2026

CHECK 2PLAN 1OTHER 23View full analysis

A release with API and configuration contract changes, new capabilities, deprecations, and bug fixes. It includes transport, telemetry, generated configuration, and data-handling updates, with no disclosed security advisories or security-specific fixes.

Check if affected (2)

breakingRelative replace paths in generated Collector source
Applies if you use the generated Collector source.
breakingNamed Config.Protocols field
Applies if you use Config.Protocols.

Plan ahead (1)

deprecatedDefaultMetricsBuilderConfig deprecation
Applies if you use DefaultMetricsBuilderConfig.

OpenCostv1.120.1ObservabilityApr 28, 2026

CHECK 1OTHER 4View full analysis

A maintenance release with a dependency update, correctness fixes, and new operator-facing capabilities. The MCP server now requires explicit opt-in when MCP_SERVER_ENABLED is not configured.

Check if affected (1)

breakingThe MCP_SERVER_ENABLED default, changed to false
Applies if MCP_SERVER_ENABLED is not configured.

Prometheusv3.11.3ObservabilityApr 27, 2026

CHECK 3View full analysis

A security maintenance release with corrections for credential exposure, request decoding validation, and stored cross-site scripting. Advisory identifiers are provided for the addressed defects, and the fixes ship in this release.

Check if affected (3)

securityhighAzureAD remote write OAuth client_secret exposure fix
Applies if you use AzureAD remote write.
securityhighRemote-read decoded-length validation
Applies if you use Remote-read.
securitymediumOld UI heatmap chart le label escaping
Applies if you use the old UI heatmap chart.

Prometheusv3.5.3ObservabilityApr 27, 2026

CHECK 4View full analysis

A security-focused release with fixes for exposed OAuth secrets and stored XSS. Remote read and write request validation now rejects snappy-compressed payloads whose declared decoded length exceeds the decode limit.

Check if affected (4)

securityhighAzureAD remote write client_secret exposure fixed
Applies if you use AzureAD remote write.
securityhighRemote-read decoded-length validation
Applies if you use Remote-read.
securitymediumOld UI heatmap chart le label escaping
Applies if you use UI.
+ 1 more on the release page

Aug 18, 2026 – Apr 27, 2026Older →

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