# Accessibility Checker upgraded to Axe Core 4.3.0

> Canonical HTML version: https://rocketvalidator.com/blog/accessibility-checker-upgraded-to-axe-core-4.3.0
> Attribution: Rocket Validator (https://rocketvalidator.com)
> License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/)

The Accessibility validation server on Rocket Validator has been upgraded to the latest version of Axe Core, 4.3.0.

<p>We've upgraded our Accessibility validation servers to the latest version of <a rel="nofollow" href="https://github.com/dequelabs/axe-core">axe-core</a>, 4.3.0, which fixes some bugs, so you may want to re-check your sites to get the most up-to-date results.</p>

## Bug Fixes

Here are some highlights from the bug fixes in release 4.3.0:

- **aria-allowed-attr**: allow aria-posinset and aria-setsize on row elements for treegrids
- **aria-allowed-attr**: pass aria-label on some HTML elements
- **aria-level**: New check for aria-level > 6 as needs review
- **aria-roles**: Mark as needs review if both none and presentation are used on element with no implicit role
- **autocomplete-appropriate**: pass for autocomplete=username and type=email
- **color-contrast**: add special case for new sr-only technique
- **color-contrast**: check for pseudo elements on element itself, not just parents
- **color-contrast-matches**: only absolutely positioned elements using clip should be not visible
- **combobox**: support aria 1.2 pattern for comboboxes
- **heading-order**: Prevent crash on page with iframes but no headings
- **heading-order**: use aria-level on headings in addition to role=header elements
- **page-no-duplicate**: don't count elements hidden from screenreaders as potential duplicates
- **meta-viewport**: test that a user-scalable number does not prevent zoom
- **region**: contents in iframes should pass the region rule if the iframe itself is in a region
- **required-parent**: Allow *item > group > *item nesting
- treat input with no role as textbox

Check out the [4.3.0 release notes](https://github.com/dequelabs/axe-core/releases/tag/v4.3.0).

## Current accessibility ruleset

Check out the full list of accessibility rules that are being checked currently by our web crawler

<a href="https://rocketvalidator.com/accessibility-validation">Accessibility rules checked by Rocket Validator</a>.
