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Bug bounty reports15,219

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

Program:Cloudflare Public Bug Bounty
Status
Severity:High
Clear
Weakness
Year
Bounty paid7
Access stated
  • No account0
  • A user account0
  • Admin or privileged0
Access needed
Technique
Clear filters13 of 15,219 reports
Disclosed bug bounty reports
ReportStatusWeaknessSeverityDisclosedBountyVotes
Bypass of Cloudflare's Cache Keys and WAF via header overflow#3027461ValidAccess ControlHigh2025-11-18–77
Yet Another CASB Integration Takeover of Active IntegrationsAnalysed#2094346ValidNo weakness recordedHigh2023-11-13–68
[Variation of #3321406] YetAnother 1-Click Chaining of Self-XSS, Cookie Tossing and AntiCSRF Token Prediction leads to auto approval in AccessTempAuthAnalysed#3423950ValidCross-site ScriptingHigh2026-04-14–63
HTTP Request Smuggling via Unsanitized Hop-by-Hop HeadersAnalysed#3622877ValidAccess ControlHigh2026-09-14$1,50054
Accessing apps protected via ZT's Access when user account is deleted/disabled even after clearing user session/seatAnalysed#2122690ValidAuthenticationHigh2023-10-25–43
[Variation of #1554049] 1-Click Chaining of Self-XSS, Cookie Tossing and AntiCSRF Token Prediction leads to auto approval in Access Temp AuthAnalysed#3321406ValidNo weakness recordedHigh2026-04-14–39
A malicious actor could rotate tokens of a victim, given that he knows the victim's token IDAnalysed#1525309ValidAccess ControlHigh2023-04-13–34
Sign in with Apple works on existing accounts, bypasses 2FAAnalysed#1593404ValidAuthenticationHigh2022-06-27$1,00032
API docs expose an active token for the sample domain theburritobot.comAnalysed#1507412ValidInformation DisclosureHigh2022-06-27$50028
Completely remove VPN profile from locked WARP iOS cient.Analysed#1633231ValidInput Validation and LogicHigh2022-11-07$1,00021
I found another way to bypass Cloudflare Warp lock!Analysed#1605847ValidInput Validation and LogicHigh2022-11-07$1,00020
Ability to bypass locked Cloudflare WARP on wifi networks.#1635748ValidInput Validation and LogicHigh2022-11-16$1,00012
Lack of Packet Sanitation in Goflow Results in Multiple DoS Attack Vectors and Bugs#1636320ValidDenial of ServiceHigh2022-09-30$5008

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 (4,365 analysed so far), which can be wrong. Data as of 2026-11-15.