10/01/2026
The W3C's September working draft for WCAG 3.0 changes the shape of accessibility conformance, not just the checklist.
Where WCAG 2.x scores each criterion pass or fail toward a single A, AA, or AAA level, the new draft splits requirements into three tiers: core, supplemental, and assertions, the last of which lets an organization document its process rather than pass a binary test.
Notably, several provisions that were previously optional at the AAA level, including transcripts, audio descriptions, and plain-language summaries, are being folded into the mandatory core tier.
For any team maintaining a component library or design system, this is worth reading now rather than after it lands. We build accessibility into our design systems from day one, and we're already mapping our own components against where this standard is heading.
Read more: For Review: WCAG 3 Working Draft, September 2026
W3C Web Accessibility Initiative
(https://www.w3.org/WAI/news/2026-09-10/wcag3/)