Issue #811: You need to upgrade Rails 7.x and 8.x now — Ruby Weekly
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Ruby Weekly issue #811 leads with an urgent security advisory to upgrade Rails 7.x and 8.x due to a critical RCE vulnerability dubbed KindaRails2Shell (CVE-2026-66066). Other highlights include ZJIT's new inlining capabilities delivering up to 35x microbenchmark speedups for block-heavy Ruby code, a code-golfing story using GPT to shrink a Roman numeral generator from 250 to 90 bytes, a 60% heap size reduction discovered through agent-assisted debugging, and the release of Courrier 1.0 for multi-provider email sending. Notable releases include Solid Queue 1.5, RBS 4.1 with JRuby support, RMagick 7.1, SimpleCov 1.0.3, and the official MCP Ruby SDK 1.0.
