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Release Notes

    Quicklinks

    Release 3.3 | Release 3.2 | Release 3.1 | Release 3.0 | Archived documentation

    Couchbase Sync Gateway
    This content describes the key features and changes implemented by release 4.0 of Couchbase Sync Gateway

    One Way Upgrade

    The migration to a 4.x configuration is a ONE WAY process — see: Upgrading for more.

    4.0.7 — July 2026

    If you use Sync Gateway 4.0.5 or 4.0.6, upgrade to this release to receive critical fixes.

    Fixed Issues

    Enhancements

    None for this release.

    Known Issues

    None for this release.

    Deprecations

    None for this release.

    4.0.6 — June 2026

    Users of this release should upgrade to Sync Gateway 4.0.7 or later to receive critical fixes.

    Fixed Issues

    Enhancements

    Known Issues

    None for this release.

    Deprecations

    None for this release.

    4.0.5 — June 2026

    This release introduced fixes for OIDC-based authentication for deployments and managing users through the Sync Gateway Admin REST API. However, users of this release should upgrade to Sync Gateway 4.0.7 or later to receive critical fixes.

    Fixed Issues

    Enhancements

    None for this release

    Known Issues

    None for this release.

    Deprecations

    None for this release.

    4.0.4 — April 2026

    Fixed Issues

    Enhancements

    Known Issues

    None for this release.

    Deprecations

    None for this release.

    4.0.3 — February 2026

    Fixed Issues

    Enhancements

    Known Issues

    None for this release.

    Deprecations

    None for this release.

    4.0.2 — December 2025

    Fixed Issues

    Enhancements

    Known Issues

    None for this release.

    Deprecations

    None for this release.

    4.0.1 — November 2025

    Fixed Issues

    Enhancements

    Known Issues

    None for this release.

    Deprecations

    None for this release.

    4.0.0 — October 2025

    Fixed Issues

    Enhancements

    Known Issues

    Deprecations

    For an overview of the latest features offered in Sync Gateway 4.0.0, see New in 4.0.

    Upgrading

    For more on upgrading — see: Upgrading

    Related Content

    API Topics
    Reference
    Community

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