Engineering notes

Umbraco.AI 1.0.0 through 1.13.x carry a moderate information-disclosure flaw and the 1.14.0 fix is a breaking change. Plus Umbraco 18 and Elements, uSync v18, and 14 December 2026 on Umbraco 13.

One product story told twelve ways. Content SDK 1.6.0 closed a preview permission hole, a community guide puts JSS end-of-support in June 2026, and Sitecore's own two posts were about readiness rather than product.

Umbraco 17.4.0 exposed JSON Schema for data types and document types, which is what makes programmatic content writing verifiable. Around it: four Umbraco.AI add-ons in beta, uSync 17.3.0's version jump, and a preview-URL auth bypass.

From 1 June, Extended Support stops including security patches and production incident support. Content SDK 2.0 requires Next.js 16 and renames middleware.ts. And the manual for Sitecore's AI surface is being written by volunteers.

Umbraco 17 LTS landed on 27 November on .NET 10, with three years of support. uSync 17.0.0 and Clean Starter Kit v7 shipped the same day. The community had a harder month than the product did.

Umbraco 17 shipped as a beta on 15 October with the final set for 27 November, and uSync 16.1.0 was declared the last feature release for v16. What that costs a site still on 13.

Umbraco 8 reached end of life in February 2025, alongside Azure TLS deadlines, a Cloud WAF default and Commerce 15 throughput claims. Six citable items in the whole month, three of them from umbraco.com.

February 2025 brought field editing into XM Cloud Pages. The rest of the month was practitioners documenting what the move costs: media URLs that expire, Solr CPU, a 10.1 to 10.4 upgrade break, and a CVE that is not in the bulletin.