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Bug bounty reports15,219

Publicly disclosed HackerOne reports, with the platform's own outcome and severity.

Program:Tor
Status:Valid
Clear
Severity
Weakness
Year
Bounty paid0
Access stated
  • No account0
  • A user account0
  • Admin or privileged0
Access needed:No account
Technique
Clear filters4 of 15,219 reports
Disclosed bug bounty reports
ReportStatusWeaknessSeverityDisclosedBountyVotes
Detecting Tor Browser UI LanguageAnalysed#282748ValidInformation DisclosureLow2019-05-21–64
Conflux-queued zero-length RELAY_END triggers heap out-of-bounds readAnalysed#3709605ValidMemory CorruptionMedium2026-09-10–33
Scrollbar Width permits detecting browser platformAnalysed#252580ValidInformation DisclosureLow2017-10-20–29
Tor onion service INTRODUCE2 invalid-MAC cells permanently grow service replay cacheAnalysed#3709703ValidDenial of ServiceLow2026-09-10–28

Status and severity are HackerOne's. “Access stated” is what the title says; “Access needed” and techniques come from CyberSIXT's analysis of the public report (3,437 analysed so far), which can be wrong. Data as of 2026-11-15.