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npm / mongodb-memory-server-core

mongodb-memory-server-core

What changed in mongodb-memory-server-core 10 to 11, from its official release notes, upgrade guides and advisories. Sources checked 2026-10-21.

3 breaking1 security7 behavior and defaults7 fixes and other

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mongodb-memory-server-core 1112 changes

Breaking changes 3

  • The lowest supported Node.js version is now 20.19.0.

    11.0.0release notes

  • MongoDB versions below 4.2.0 are no longer supported.

    11.0.0release notes

  • The mongodb-memory-server-global-4.0 package was removed because it is unsupported by the MongoDB driver.

    11.0.0release notes

Security 1

  • Binaries are checksummed during extraction and checked, helping detect invalid binaries.

    11.3.0release notes

Behavior and default changes 5

  • The MongoMemoryReplSet electionTimeoutMillis timeout is increased to 5000ms.

    11.3.0release notes

  • The default 4.4 binary is updated to 4.4.30.

    11.1.0release notes

  • The default MongoDB binary version is updated to 8.2.6.

    11.1.0release notes

  • The default MongoDB binary version is now 8.2.1.

    11.0.0release notes

  • Resume downloads is enabled by default.

    11.0.0release notes

Fixes and other changes 3

  • MongoInstance::stop now always unsets mongodProcess, changing process state after stopping.

    11.3.0release notes

  • USE_HTTP requests now use the http module.

    11.0.1release notes

  • Corrected the configuration mapping for RESUME_DOWNLOAD.

    10.4.1, 11.0.0release notesrelease notes

mongodb-memory-server-core 106 changes

Behavior and default changes 2

  • The RESUME_DOWNLOAD option is stabilized.

    10.4.0release notes

  • Updates the default MongoDB binary version to 7.0.24 and the default 4.2 and 4.4 binaries to 4.2.25 and 4.4.29.

    10.3.0release notes

Fixes and other changes 4

  • Adds a fallback version when determining the SUSE version string.

    10.3.0release notes

  • Accounts for a known compatibility issue on SUSE 12 with MongoDB versions >=8.0.0.

    10.3.0release notes

  • Accounts for known compatibility issues on SUSE 13 and 14.

    10.3.0release notes

  • Silences ECONNRESET errors during shutdown.

    10.3.0release notes