Uptime Kuma 2.5.5 released on 16-09-2026
Uptime Kuma 2.5.5 is out now. It fixes a memory leak in the TCP monitor (issue #7848) that could cause long-running instances or hosts with many TCP checks to gradually consume increasing amounts of RAM.
Download the build and read the full notes on the Uptime Kuma GitHub releases page for complete details and installation instructions.
What’s in this release
- Fix for a memory leak originating from the TCP monitor (issue #7848).
- Stability and resource-usage improvements: reduced risk of OOM or degraded performance over time, especially on low-memory devices and containerised deployments.
- Practical upgrade guidance included: restart Uptime Kuma services after updating, monitor memory usage to confirm the improvement, and collect logs if issues continue.
Upgrade notes
- No breaking changes reported; restart Uptime Kuma services after updating to ensure the fix takes effect.
- No special rollback requirements for most users; if you need to revert, reinstall the previous release and gather logs, then reference issue #7848 when filing reports on the project’s GitHub.
Share your experience after upgrading — did the memory use stabilise for your setup? Leave a comment or open an issue on GitHub with logs if anything looks off.
