[Webkit-unassigned] [Bug 279249] New: Loading is blocked when trying to load localhost content from HTTPS website in Safari 18 beta

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=279249

            Bug ID: 279249
           Summary: Loading is blocked when trying to load localhost
                    content from HTTPS website in Safari 18 beta
           Product: WebKit
           Version: Safari 18
          Hardware: Mac (Apple Silicon)
                OS: macOS 15
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: kento.kataoka at optim.co.jp

In Safari 18 beta, it blocks loading when trying to load localhost content from HTTPS websites.

The JavaScript console in Safari shows the following.

> [blocked] The page at https://example.com/example requested insecure content from http://127.0.0.1:8080/dummy.png?state=XXXXXXXX. This content was blocked and must be served over HTTPS.

In Safari 17.5, it displays as follow and we can load it.

> The page at https://example.com/example was allowed to display insecure content from http://127.0.0.1:8080/dummy.png?state=XXXXXXXX.

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