Opera Software recently experienced an attack on the internal infrastructure. Following best practices, Opera Software is replacing signing certificates in Opera with newly issued certificates. Certificates in Opera include the code signing certificate for desktop binaries and the signing certificate for automatic updates to browser.js. Opera’s rootstore was not affected by the attack and certificates used for accessing HTTPS websites are unchanged by this update.
This issue affects Opera Desktop for all platforms, and some device platforms.
Opera has released Opera Desktop 12.16 signed with a new certificate, and Opera Mobile Classic for Android 12.1.5. Other products may be updated as necessary.