--- title: "Issue #811: You need to upgrade Rails 7.x and 8.x now — Ruby Weekly" url: https://daily.dev/posts/issue-811-you-need-to-upgrade-rails-7-x-and-8-x-now-ruby-weekly-37nw6gntz source_url: https://rubyweekly.com/issues/811 type: article source: "Ruby Weekly" published: 2026-07-30T12:28:29.458Z updated: 2026-07-30T12:29:16.539Z tags: ["security", "ruby", "rails"] reading_time: 2 upvotes: 0 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Issue #811: You need to upgrade Rails 7.x and 8.x now — Ruby Weekly **[Ruby Weekly](https://daily.dev/sources/rbywkly)** · 2 min read · 0 upvotes · 0 comments ## Summary 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. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Ruby Weekly Issue 779: December 11, 2025](https://daily.dev/posts/ruby-weekly-issue-779-december-11-2025-epempsdkp) · Ruby Weekly · 2 upvotes · 0 comments - [Short Ruby Newsletter - edition 162](https://daily.dev/posts/short-ruby-newsletter---edition-162-xngdavw9r) · RUBYLAND · 0 upvotes · 0 comments - [Short Ruby Newsletter - edition 154](https://daily.dev/posts/short-ruby-newsletter---edition-154-8mctkfzce) · RUBYLAND · 2 upvotes · 0 comments --- Tags: [#security](https://daily.dev/tags/security), [#ruby](https://daily.dev/tags/ruby), [#rails](https://daily.dev/tags/rails) [View this post on daily.dev](https://daily.dev/posts/issue-811-you-need-to-upgrade-rails-7-x-and-8-x-now-ruby-weekly-37nw6gntz)