Sirena 2005

Siren Travel, the leading airline booking system in Russia, suffered a massive data breach around 2005. The incident resulted in the exposure of personal records belonging to approximately 3 million passengers. The leaked information originated from the central reservation system and contained highly sensitive personal identifiers used for flight bookings and travel documentation. This breach is considered one of the earliest major occurrences of passenger data exposure in the regional aviation sector, highlighting vulnerabilities in legacy booking infrastructures during that period.