[wp-trac] [WordPress Trac] #63714: Missing width/height attributes on SVG file since WP 6.8.2

[WordPress Trac]

#63714: Missing width/height attributes on SVG file since WP 6.8.2
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 Reporter:  rainbowgeek   |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  6.8.3
Component:  Media         |     Version:  6.8.2
 Severity:  major         |  Resolution:
 Keywords:                |     Focuses:
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Comment (by shreya0shrivastava):

 I was able to reproduce the bug following the steps mentioned by
 @rainbowgeek
 == Reproduction Report
 === Description
 This report validates whether the issue can be reproduced.

 === Environment
 - WordPress: 6.8.1, 6.8.2
 - PHP: 8.2.23
 - Server: nginx/1.26.1
 - Database: mysqli (Server: 8.0.35 / Client: mysqlnd 8.2.23)
 - Browser: Chrome 138.0.0.0
 - OS: macOS
 - Theme: Twenty Twenty-Five 1.0
 - MU Plugins:
   * test 1 (contains code to allow SVG)
 - Plugins:
   * Test Reports 1.2.0

 === Actual Results
 1.  ✅ Error condition occurs (reproduced).

 === Steps for reproduction
 1. Add a mu-plugin with the following code:
 {{{#!php
 <?php
 add_filter('upload_mimes', function($mimes) {
        $mimes['svg'] = 'image/svg+xml';
        return $mimes;
    });
 }}}

 2. Go to the Media Library and upload an SVG file. Note its attachment ID.

 3. In your theme’s `functions.php`, add:

 {{{#!php
 <?php
 add_action('wp_head', function() {
        echo wp_get_attachment_image(ATTACHMENT_ID, 'full', '', array(
            'class' => 'mb-4',
            'height' => 240,
            'width'  => 240
        ));
    });
 }}}

    Replace `ATTACHMENT_ID` with the actual SVG attachment ID.

 4. Visit the frontend and inspect the rendered `<img>` tag in the browser.
 5. Check for both WP 6.8.1 and WP 6.8.2

 === Additional Notes
 - Height and width attributes show up on using WP 6.8.1
 - Height and width attributes do not show up on using WP 6.8.2
 - The same code was used to add SVG for both WP versions

 === Supplemental Artifacts
 For WP 6.8.1
 [[Image(https://i.ibb.co/9kWHbXzK/Screenshot-2025-07-22-at-4-11-36-PM.png)]]

 For WP 6.8.2
 [[Image(https://i.ibb.co/Rp3464cR/Screenshot-2025-07-22-at-4-17-43-PM.png)]]

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Ticket URL: <https://core.trac.wordpress.org/ticket/63714#comment:8>
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