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Ormandy initially said in a tweet that Cloudflare was leaking customer HTTPS sessions for Uber , FitBit , OKCupid and others , all of which said the impact of Cloudbleed on their data was minimal .
 ( data breach: was leaking,  Cloudflare: attacker, customer: victim, HTTPS sessions: compromised data, Uber: victim, FitBit: victim, OKCupid: victim) 
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:
 ( data breach: was leaking,  Cloudflare: attacker, customer: victim, HTTPS sessions: compromised data, Uber: victim, FitBit: victim, OKCupid: victim) 