GlassFish 4.1.1 has just been released and despite the minor version increase, 4.1.1 is certainly not an insignificant update!

In this 4.1.1 release, most the underlying GlassFish components have been updated. The list below contains some of the updated components.
- Jersey 2.21 (JAX-RS 2.0.1 aka JAX-RS 2.0 rev A)
- Weld 2.2.13.Final (CDI 1.2)
- MQ 5.1.1-b02 (JMS 2.0.1)
- Tyrus 1.11 (WebSocket 1.1 )
- Mojarra 2.2.12
- EclipseLink 2.6.1-RC1
- Grizzly 2.3.23
- HK2 2.4.0-b31
- JBatch Runtime 1.0.1-b09
- JSON-P RI 1.0.4
- etc.
Finally, it should also be mentioned that and in addition to various bug fixes, GlassFish 4.1.1 also includes several security related fixes.
You can download GlassFish 4.1.1 here and grab the source code here.