A recent hack of market research firm Klue has resulted in a data breach affecting several prominent cybersecurity companies, including Huntress, HackerOne, and Tanium. The breach, which occurred at an unspecified time, allowed attackers to steal sensitive data from these firms, potentially compromising their operations and security. The incident highlights the vulnerabilities of even the most security-conscious organizations to supply chain attacks, where a breach at one company can have far-reaching consequences for others. The fact that companies like Recorded Future and Jamf were also affected underscores the interconnected nature of the cybersecurity industry1. This breach serves as a stark reminder that cybersecurity firms are not immune to data breaches, and the consequences of such incidents can be severe. The impact of this breach on the affected companies and the broader cybersecurity industry is still being assessed, so what matters most to practitioners is the need to reassess their own supply chain security and incident response plans.