Skip to content
Projects

undertow-io/undertow has 3,760 GitHub stars and 1,054 forks. GitHot measured 0 stars in 24 hours. Last checked 2026-11-06 18:17 UTC. Last push 2026-10-20.

How these counts are measured

High performance non-blocking webserver

Measured star growth

in 24h
0
in 7 days
Update delayed
in 15 days
Update delayed
in 1 month
Update delayed

Net star changes over overlapping periods, not daily totals. Missing measurements are left blank. Stars measure attention, not software quality.

README.md

Original

Undertow

Undertow is a Java web server based on non-blocking IO. It consists of a few different parts:

  • A core HTTP server that supports both blocking and non-blocking IO
  • A Servlet 4.0/5.0/6.0 implementation
  • A JSR-356/Jakarta 2.0 compliant Web Socket implementation

Website: http://undertow.io

Issues: https://issues.redhat.com/projects/UNDERTOW

Project Lead: Flavia Rainone [email protected]

Undertow Dev Group: https://groups.google.com/g/undertow-dev/ (you can access archived discussions of old undertow-dev mail list here)

Zulip Chat: https://wildfly.zulipchat.com stream #undertow

Notifying Security Relevant Bugs

If you find a bug that has a security impact, please notify us sending an email to Red Hat SecAlert [email protected] with a copy to Flavia Rainone [email protected]. This will ensure the bug is properly handled without causing unnecessary negative impacts for the Undertow's user base.

You can find more information about the security procedures at this page.

Explore related projects