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Cloudbleed is a serious vulnerability in Cloudflare ’s internet infrastructure that Google Project Zero researcher Tavis Ormandy discovered in mid-February .
 ( discover vulnerability: discovered,  Cloudbleed: vulnerability, a serious vulnerability: vulnerability, internet infrastructure: vulnerable system, Google Project Zero researcher Tavis Ormandy: discoverer, mid-February: time, 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,  Cloudbleed: vulnerability, a serious vulnerability: vulnerability, internet infrastructure: vulnerable system, Google Project Zero researcher Tavis Ormandy: discoverer, mid-February: time, Cloudflare: vulnerable system owner) 