2606
While working on something completely unrelated , Google security researcher , Tavis Ormandy , recently discovered that Cloudflare was leaking a wide range of sensitive information , which could have included everything from cookies and tokens , to credentials .
 ( discover vulnerability: discovered,  Tavis Ormandy: discoverer, Google security researcher: discoverer, Cloudflare: vulnerable system owner) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: phishing, data breach, ransom, discover vulnerability, patch vulnerability, Arguments type: vulnerable system, capabilities, vulnerability, number of victim, issues addressed, compromised data, damage amount, common vulnerabilities and exposures, victim, patch number, number of data, tool, discoverer, time, purpose, place, payment method, releaser, vulnerable system version, attacker, supported platform, patch, price, vulnerable system owner, trusted entity, attack pattern. 
Text: {0} 
Answer:
 ( discover vulnerability: discovered,  Tavis Ormandy: discoverer, Google security researcher: discoverer, Cloudflare: vulnerable system owner) 