Release Date: 18 December 2025

Release Note for Neo4j 5.26.19 (18 December 2025)

Server

  • Fixed an issue where any single relationship having more than ~10MiB worth of property data may fail the import. Now that limit is ~2GiB.
  • Fixed an issue when running e.g. copy or migrate where the source and target database is block format, where relationships with a large amount of properties might lose their properties.

Cypher

  • More timely query queue maintenance in parallel runtime, to prevent failed queries from holding on to heap memory for longer than necessary.

Security

Bundled Packages:

  • labs/apoc-5.26.19
  • lib/neo4j-browser-2025.12.17+0
  • products/bloom-plugin-5.x-2.28.1
  • products/neo4j-genai-plugin-5.26.19
  • products/neo4j-graph-data-science-2.13.7
  • products/neo4j-ops-manager-agent-1.14.0
  • product/fleetManagement-1.1.0
  Please refer to the changelog for full details of the changes.

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