Preconditions (*)

1. Magento 2.4.1, 2.4.3 (this problem may exist from 2.3.3).
2. Stores -> Configuration -> Catalog -> Catalog -> Search Engine Optimization -> Product URL Suffix is empty.
3. Stores -> Configuration -> Catalog -> Catalog -> Search Engine Optimization -> Category URL Suffix is empty.
4. Stores -> Configuration -> Catalog -> Catalog -> Search Engine Optimization -> Use Categories Path For Product URLs is Yes.
5. Stores -> Configuration -> Catalog -> Catalog -> Search Engine Optimization -> Generate "category/product" URL Rewrites is No.
6. There is a category Test Category created under root category and Test Sub Category created under Test Category. There is a product Test and it is assigned to Test Sub Category. This is to make category url path have the product url path in it preceded by a forward slash (/). In this example the product url path is "test" and Test Sub Category url path is "test-category/test-sub-category"

Steps to reproduce (*)

1. Go to Test Sub Category.
2. Click on product Test.

Expected result (*)

1. The product page is loaded successfully.

Actual result (*)

1. There is 404 error (on 2.4.3 or newer version) or 500 error (on older version than 2.4.3).

Looks like on line 173 in \Magento\CatalogUrlRewrite\Model\Storage\DynamicStorage function str_replace should not be used. We fixed it on our installation by changing that line to this:

$categoryPath = substr($requestPath, 0, -1 * strlen('/' . $productUrl));

Please provide Severity assessment for the Issue as Reporter. This information will help during Confirmation and Issue triage processes.

• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.