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Releases

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

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AllAI & MLCI/CD & App DeliveryKubernetes CoreNetworking & MessagingObservabilityOrchestration & ManagementProvisioning & RuntimeSecurityStorage & Data
May 2026Clear ×
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.

Source ↗
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.

Source ↗
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.

Source ↗
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.

Source ↗
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)

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.

Source ↗
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.

Source ↗
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