Partial credit card data data breaches

Kemper Corporation had data on approximately 269,000 individuals exposed after the ShinyHunters ransomware group accessed its Salesforce environment via social engineering and published the stolen data in an extortion campaign.

Mytheresa, a luxury fashion e-commerce platform, had data on approximately 84,000 customers exposed after the ShinyHunters extortion group published it following a failed ransom demand in April 2026.