Magento Commerce 126.96.36.199 and Open Source 188.8.131.52.
Contains multiple security enhancements that help close remote code execution (RCE), cross-site scripting (XSS), cross-site request forgery (CSRF) and other vulnerabilities.
Magento Commerce 184.108.40.206-220.127.116.11 (supee-11086 or upgrade to Magento Commerce 18.104.22.168)
Magento Open Source 22.214.171.124-126.96.36.199 (SUPEE-11086 or upgrade to Magento Open Source 188.8.131.52)
Information for all changes available in Magento Commerce and Magento Open Source release notes.
Ideally you should have your developer apply the patches. Alternatively, please raise a ticket and Dx3webs will apply and ‘best endeavours’ basis. (Please note we will backup your site.. apply the patches and request that you check that all is well. If not the best we can do is to roll back the patches at which time you will need to seek support from your developer).