Home Assistant Core Updates Improve Integration Stability and Expand Header Limits

Overview of Home Assistant Core

Home Assistant Core is an open-source home automation platform widely used by developers and tech enthusiasts to integrate and control smart home devices. It supports a broad range of integrations, enabling users to monitor and automate devices from various manufacturers within a unified interface. The platform is continuously updated to fix bugs, improve compatibility, and enhance performance.

Key Changes in Release 2026.10.3

Released on October 23, 2026, version 2026.10.3 focuses primarily on resolving issues across multiple integrations and updating dependencies:

• Proxmox VE Integration: Fixed update version detection issues that previously caused problems with monitoring Proxmox VE nodes, virtual machines, and containers. This addresses user difficulties in reauthentication and update handling.
• UniFi Access: Resolved duplicate access event logging, improving the accuracy of access control monitoring.
• Omada Controller: Added handling for missing update fields to prevent errors during status checks.
• SMTP Integration: Modified SSL context creation to avoid sharing contexts, enhancing security and reliability in email notifications.
• Synology DSM: Improved error handling for button press actions to prevent crashes.
• KNX Integration: Adjusted bootstrap timeout behavior to wait for telegram store initialization, ensuring smoother startup.
• Sensibo: Fixed an issue where the full state action unintentionally modified coordinator data.
• FRITZ!SmartHome Sensors: Corrected sensor mix-ups between lock and device lock states.
• Home Connect: Fixed event listener stoppage caused by token refresh errors.

Additionally, this release updated several dependencies, including Python to version 3.14.8, the base image to Ubuntu 26.04, and various integration libraries such as blebox-uniapi, opower, and victron-vrm. The frontend was also updated to version 20260930.5.

Key Changes in Release 2026.10.4

Published on October 24, 2026, the 2026.10.4 release includes two main updates:

• Increased aiohttp Client Header Limits: The limit for HTTP client headers used by aiohttp was raised to 64 KiB. This change addresses issues where large header sizes caused update blocks, notably improving the reliability of integrations that communicate extensively over HTTP. This fix was particularly relevant for users experiencing problems with GitHub downloads and other web session operations.
• Dependency Update for Lutron Caseta: The pylutron-caseta library was bumped to version 0.30.0, ensuring better support and compatibility for Lutron Caseta smart lighting systems.

User Impact and Community Feedback

The fixes in 2026.10.3 have resolved several integration-specific bugs that affected users’ ability to monitor and control their smart home devices accurately. For example, the Proxmox VE update detection fix responds to user reports of reauthentication problems and update failures.

The increase in aiohttp client header limits in 2026.10.4 has been noted as a significant improvement for users who experienced update interruptions due to header size constraints. This change helps maintain smoother update operations and reduces the likelihood of blocked downloads from services like GitHub.

Some users reported issues with specific devices such as the KASA EP10 Plug after upgrading to 2026.10.3 and 2026.10.4, indicating ongoing challenges with certain integrations that may require further investigation.

Conclusion

These two incremental releases of Home Assistant Core continue the project’s pattern of addressing integration-specific bugs, updating dependencies, and improving core functionality. The raised aiohttp header limit in 2026.10.4 is a notable enhancement that improves network communication reliability, while the broad range of fixes in 2026.10.3 enhances stability across many popular integrations. Users of Home Assistant Core are encouraged to update to these versions to benefit from these improvements.