The JRuby community is pleased to announce the release of JRuby 10.0.6.0.

• Homepage: https://www.jruby.org/
• Download: https://www.jruby.org/download

JRuby 10.0.6.x targets Ruby 3.4 compatibility.

Thank you to our contributors this release, you help keep JRuby moving forward! @chadlwilson, @kares, @sampokuokkanen

Notable Changes:

Standard Library

• erb has been updated to 4.0.4.1 to address CVE-2026-41316. (#9389)
• jruby-openssl has been updated to 0.16.0, fixing many long-standing issues with SSLSocket. (#6455, #8935, #9390)

Java Integration

• Performance and consistency improvements for passing a block or proc as the implementation of a Java interface. (#1401, #9401, #9424)

23 Issues and PRs resolved for 10.0.6.0

• #1401 Java interface using closure implementaion is slower than mixin implementation
• #6455 Unhandled IOError –> SSLSocket.java:893:in `sysread_nonblock’
• #8935 Error during gem push using jruby
• #9367 review (wrong) asserts
• #9368 [refactor] remove duplicate fallback in CallableSelector
• #9372 Crash when AOT compiling rubocop-ast sources
• #9373 Ensure the initial string has correct size
• #9389 [10.0] deps(stdlib): bump erb from 4.0.4 to 4.0.4.1 to resolve CVE-2026-41316
• #9390 [10.0] [deps] bump jruby-openssl to 0.16.0
• #9401 improve performance for Java “block-to-interface” conversion
• #9416 Checking out aws-sdk-ruby creates a file with binary data.
• #9421 Fix missing frozen check in 1 and 2-element Array sort!/reverse!
• #9424 proc to interface inconsistency with multiple args
• #9451 [fix] escape shell metachars in chdir: to prevent injection
• #9457 Deprecate and replace all RubyHash, RubyString, and RubyArray constructors
• #9458 Support backtrace_locations with Java exceptions
• #9461 [ji] support java.lang.Throwable#backtrace_locations
• #9474 Deprecate RubyHash constructors for 10.1 abstraction
• #9476 Backport extended dist verification to 10.0
• #9478 [fix] @JRubyMethod error with required>=1 and var-args
• #9484 Make JVM bytecode version detection more robust
• #9489 Deprecate all public String constructors
• #9490 Deprecate public RubyArray constructors