Cybersecurity Brief – April 28, 2026

Application security vendor Checkmarx confirmed that data from its GitHub repositories was posted to the dark web following a March 23 security incident. The company has acknowledged the breach and is working to assess the full scope of compromised data. While details remain limited, the incident underscores ongoing risks to software supply chains when development infrastructure is targeted, particularly for security vendors whose tools are widely integrated into enterprise environments.

Insurance giant Aflac has become the latest victim in an accelerating wave of cyberattacks targeting the insurance sector. The attack follows a pattern of intrusions against insurance companies, which hold vast repositories of sensitive personal and financial data. The concentration of attacks on this industry suggests threat actors are either exploiting common vulnerabilities in insurance sector infrastructure or specifically targeting these firms for their high-value data holdings. No details on the attack vector or data exposure have been disclosed.

Sources: The Hacker News · ABC News