Provide references for CVE-2020-7776.
Where can I find more information about CVE-2020-7776?
References are available at: https://snyk.io/vuln/SNYK-PHP-PHPOFFICEPHPSPREADSHEET-1048856, https://github.com/PHPOffice/PhpSpreadsheet/commit/0ed5b800be2136bcb8fa9c1bdf59abc957a98845, https://github.com/PHPOffice/PhpSpreadsheet/blob/master/src/PhpSpreadsheet/Writer/Html.php%23L1792.