aria-label attribute disallowed on iframe

[jmedwards-indeed]

Product: axe-core

Expectation: aria-label can be used to supply an accessible name for an iframe (with no explicit role and no title attribute)
Actual: Issue flagged as Critical:

Elements must only use allowed ARIA attributes
Issue Description
Ensures ARIA attributes are allowed for an element's role

Element location
iframe
Element source
<iframe class="cmp-ResponsiveVimeoVideo-iframe" src="https://player.vimeo.com/video/336812686?dnt=true" frameborder="0" allowfullscreen="" aria-label="Video player" data-ready="true"></iframe>
To solve this issue, you need to...
Fix the following:
ARIA attribute cannot be used: aria-label

Motivation: Use of aria-label on iframe appears to be acceptable under applicable standards, and some sources suggest or recommend this attribute as an alternative to title (particularly in cases where a tooltip is undesirable).

axe-core version: 4.2.0
(tested with) axe DevTools version: 4.9.3

[straker]

Thanks for the issue. I believe this is related to #2933 and #2926 and should be fixed by #2929 and #2935

[WilcoFiers]

Firstly, you should probably use title attributes for iframes. Unfortunately on Safari, the aria-label attribute is ignored.

Steve is right though, we introduced a bug in axe-core 4.2.0. We released a fix for it yesterday with 4.2.1 which we're rolling out everywhere in the next week or so.