Pressable vs Jenkins

The weekly releases continue without interruption, and two threads dominate the last two months. One is slimming: 2.574 stopped bundling the JUnit, Mailer, Matrix Authorization, Matrix Project and OWASP Markup Formatter plugins, cutting more than 20 MB from jenkins.war and ending automatic installation for very old upgrade paths. The other is security posture — a password complexity extension point, type checks on deserialized collection elements, and Object field deserialization prohibited by default, capped by an important security fix in 2.575. Running underneath both is a continuous refit of the experimental Manage Jenkins UI.

This is a mature project reducing its own surface area rather than growing it. Unbundling plugins moves maintenance burden to where it belongs and makes the core smaller to audit; the deserialization defaults close a class of vulnerability that has historically been Jenkins' most expensive. The UI work is patient and unglamorous — status icons, breadcrumbs, notification components, translations — which is what a redesign shipped incrementally behind an experimental flag looks like.

Expect the Manage Jenkins redesign to keep advancing page by page toward becoming the default, and more deserialization and serialization defaults to tighten. The unbundling precedent set by 2.574 suggests further candidates for removal from the war.