RESOLVED DUPLICATE of bug 242869307812
video element doesn't respect CORS for WebM resources 
https://bugs.webkit.org/show_bug.cgi?id=307812
Summary video element doesn't respect CORS for WebM resources
Andriy
Reported 2026-02-13 09:23:37 PST
Safari 18 and 26 on iOS and macOS with WebM videos only always treat <video> element as tainted (insecure) with WebM sources even if correct CORS headers and crossorigin="anonymous" set. Minimum reproducible example that does snapshots from video to canvas: https://jsfiddle.net/s2w5vk76/ It doesn’t work in Safari 18 and 26 failing with a security error. It works in all other browsers: Chrome, Firefox, Safari 17 (tested in BrowserStack), Epiphany (WebKit in Ubuntu) Also this example works in Safari 18 and 26 if change source from WebM to MP4
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Radar WebKit Bug Importer
Comment 1 2026-02-20 09:24:10 PST
<rdar://problem/170810382>
owen.morgan
Comment 2 2026-02-26 01:37:43 PST
Pull Request: https://github.com/WebKit/WebKit/pull/59495
Anne van Kesteren
Comment 3 2026-06-05 07:04:49 PDT
*** This bug has been marked as a duplicate of bug 242869 ***
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