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Releases

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

May 2026Clear ×Project: PrometheusClear ×
Prometheusv3.12.0ObservabilityMay 28, 2026

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.

    Remote Write rejects snappy-compressed received requests whose declared decoded length exceeds 32MB.

  • securityPlaintext secret exposure in STACKIT SD

    Applies if you use STACKIT SD.

    STACKIT SD no longer exposes secrets in plaintext through the /-/config endpoint. This fix addresses GHSA-39j6-789q-qxvh.

  • breakingDecompressed body-size limit for OTLP write requests

    Applies if you use OTLP.

    OTLP limits the decompressed body size for gzip-encoded write requests.

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