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Bug bounty program

CP

Cloudflare Public Bug Bounty

Open on HackerOneAtlas
Platform
HackerOne
Bounties
Pays
Assets in scope
51
Disclosed reports
44
Subdomains
24,298
Vendor on CyberSIXT
Cloudflare (70 CVEs, 0 exploited)

Most upvoted reports44

All reports
Most upvoted reports of Cloudflare Public Bug Bounty
ReportWeaknessDisclosedBountyVotes
HTTP Request Smuggling in Transform Rules using hexadecimal escape sequences in the concat() functionAnalysed#1478633Injection and Smuggling2022-05-16$6,000116
Cloudflare CASB Confused Deputy ProblemAnalysed#1952124No weakness recorded2023-06-07$3,30097
Using special IPv4-mapped IPv6 addresses to bypass local IP banAnalysed#1785260No weakness recorded2023-01-24$7,50078
Bypass of Cloudflare's Cache Keys and WAF via header overflow#3027461Access Control2025-11-18–77
Hijack all emails sent to any domain that uses Cloudflare Email ForwardingAnalysed#1419341Access Control2022-07-28$6,00076
`use-mcp`'s oauth2 process uses a window.open call with untrusted mcp server provided data allowing for code execution under the page using itAnalysed#3211031Cross-site Scripting2025-09-30$55075
Yet Another CASB Integration Takeover of Active IntegrationsAnalysed#2094346No weakness recorded2023-11-13–68
[Variation of #3321406] YetAnother 1-Click Chaining of Self-XSS, Cookie Tossing and AntiCSRF Token Prediction leads to auto approval in AccessTempAuthAnalysed#3423950Cross-site Scripting2026-04-14–63
AI Playground XSS to steal user-chat messages and access to connected MCP ServerAnalysed#3424998Cross-site Scripting2026-02-26–62
Bypass R2 payment screenAnalysed#2170559Authentication2023-11-10$35057

Subdomains24,298

Root:cloudflareaccess.com
Scope
Name suggests
First seen
Text fileClear filters4,882 names
Subdomains of Cloudflare Public Bug Bounty
NameScopeFirst seen
dcs.cloudflareaccess.comNot in the scope2026-11-14
dd-tunnel.cloudflareaccess.comNot in the scope2026-11-14
de.cloudflareaccess.comNot in the scope2026-11-14
deadputler.cloudflareaccess.comNot in the scope2026-11-14
dealercz.cloudflareaccess.comNot in the scope2026-11-14
debatecom.cloudflareaccess.comNot in the scope2026-11-14
decathlon-apac-chopper.cloudflareaccess.comNot in the scope2026-11-14
decentagency.cloudflareaccess.comNot in the scope2026-11-14
decisionlift.cloudflareaccess.comNot in the scope2026-11-14
decisivemedia.cloudflareaccess.comNot in the scope2026-11-14
decosta.cloudflareaccess.comNot in the scope2026-11-14
deep-labs.cloudflareaccess.comNot in the scope2026-11-14
deepcoder.cloudflareaccess.comNot in the scope2026-11-14
deeproot.cloudflareaccess.comNot in the scope2026-11-14
deer-cod.cloudflareaccess.comNot in the scope2026-11-14
deeteam.cloudflareaccess.comNot in the scope2026-11-14
defaultroute.cloudflareaccess.comNot in the scope2026-11-14
defcon-systems.cloudflareaccess.comNot in the scope2026-11-14
defenseark.cloudflareaccess.comNot in the scope2026-11-14
definedcrowd.cloudflareaccess.comNot in the scope2026-11-14
defiplaza.cloudflareaccess.comNot in the scope2026-11-14
defzero.cloudflareaccess.comNot in the scope2026-11-14
dehazelabs.cloudflareaccess.comNot in the scope2026-11-14
deinc.cloudflareaccess.comNot in the scope2026-11-14
dejan.cloudflareaccess.comNot in the scope2026-11-14
dejavu-moe.cloudflareaccess.comNot in the scope2026-11-14
dekeeu.cloudflareaccess.comNot in the scope2026-11-14
delfix.cloudflareaccess.comNot in the scope2026-11-14
deliciousmagazine.cloudflareaccess.comNot in the scope2026-11-14
deliveryhero.cloudflareaccess.comNot in the scope2026-11-14
deliveryhero-opsportal.cloudflareaccess.comNot in the scope2026-11-14
deltablue.cloudflareaccess.comNot in the scope2026-11-14
deltarus.cloudflareaccess.comNot in the scope2026-11-14
demerarabank.cloudflareaccess.comNot in the scope2026-11-14
demo.cloudflareaccess.comtestNot in the scope2026-11-14
demolitioncom.cloudflareaccess.comNot in the scope2026-11-14
denbydaily.cloudflareaccess.comNot in the scope2026-11-14
dendreo.cloudflareaccess.comNot in the scope2026-11-14
denexia.cloudflareaccess.comNot in the scope2026-11-14
dennisotugo.cloudflareaccess.comNot in the scope2026-11-14
departmentoftransport.cloudflareaccess.comNot in the scope2026-11-14
depewtechs.cloudflareaccess.comNot in the scope2026-11-14
dequeue.cloudflareaccess.comNot in the scope2026-11-14
derek.cloudflareaccess.comNot in the scope2026-11-14
des-essarts.cloudflareaccess.comNot in the scope2026-11-14
deseretnewspublishingcompany.cloudflareaccess.comNot in the scope2026-11-14
desertbus.cloudflareaccess.comNot in the scope2026-11-14
designit.cloudflareaccess.comNot in the scope2026-11-14
detaly.cloudflareaccess.comNot in the scope2026-11-14
detour.cloudflareaccess.comNot in the scope2026-11-14
dev.cloudflareaccess.comdevNot in the scope2026-11-14
dev-foryouandyourcustomers.cloudflareaccess.comdevNot in the scope2026-11-14
devbyio.cloudflareaccess.comNot in the scope2026-11-14
devdccc.cloudflareaccess.comNot in the scope2026-11-14
devdot.cloudflareaccess.comNot in the scope2026-11-14
develatio.cloudflareaccess.comNot in the scope2026-11-14
developers.cloudflareaccess.comNot in the scope2026-11-14
devgg.cloudflareaccess.comNot in the scope2026-11-14
devops.cloudflareaccess.comNot in the scope2026-11-14
devsellingbot.cloudflareaccess.comNot in the scope2026-11-14
devstorage.cloudflareaccess.comNot in the scope2026-11-14
devv.cloudflareaccess.comNot in the scope2026-11-14
devxtesting.cloudflareaccess.comNot in the scope2026-11-14
dexterslab.cloudflareaccess.comNot in the scope2026-11-14
deydasapps.cloudflareaccess.comNot in the scope2026-11-14
dfdl.cloudflareaccess.comNot in the scope2026-11-14
dfsa.cloudflareaccess.comNot in the scope2026-11-14
dfsco.cloudflareaccess.comNot in the scope2026-11-14
dgadelha.cloudflareaccess.comNot in the scope2026-11-14
dgtl.cloudflareaccess.comNot in the scope2026-11-14
dhlogisticsauth.cloudflareaccess.comNot in the scope2026-11-14
diabetestracker.cloudflareaccess.comNot in the scope2026-11-14
dialforhire.cloudflareaccess.comNot in the scope2026-11-14
diamondschmitt.cloudflareaccess.comNot in the scope2026-11-14
dianomi.cloudflareaccess.comNot in the scope2026-11-14
dierbergs.cloudflareaccess.comNot in the scope2026-11-14
difference.cloudflareaccess.comNot in the scope2026-11-14
difrol.cloudflareaccess.comNot in the scope2026-11-14
digitain.cloudflareaccess.comNot in the scope2026-11-14
digital-on.cloudflareaccess.comNot in the scope2026-11-14
digitalexchange.cloudflareaccess.comNot in the scope2026-11-14
digitalibraheemali.cloudflareaccess.comNot in the scope2026-11-14
digitalinnovation.cloudflareaccess.comNot in the scope2026-11-14
digitalmarkets.cloudflareaccess.comNot in the scope2026-11-14
digitalpoint.cloudflareaccess.comNot in the scope2026-11-14
digitalventures.cloudflareaccess.comNot in the scope2026-11-14
digitalweb.cloudflareaccess.comNot in the scope2026-11-14
digitalwellness.cloudflareaccess.comNot in the scope2026-11-14
digithun.cloudflareaccess.comNot in the scope2026-11-14
digitonic.cloudflareaccess.comNot in the scope2026-11-14
diglib-react-deployment-pages.cloudflareaccess.comNot in the scope2026-11-14
dignep.cloudflareaccess.comNot in the scope2026-11-14
dimitris.cloudflareaccess.comNot in the scope2026-11-14
dingleberryranch.cloudflareaccess.comNot in the scope2026-11-14
dinotech.cloudflareaccess.comNot in the scope2026-11-14
dinotechmedia.cloudflareaccess.comNot in the scope2026-11-14
directasia.cloudflareaccess.comNot in the scope2026-11-14
directnetsolution.cloudflareaccess.comNot in the scope2026-11-14
discordappcom.cloudflareaccess.comNot in the scope2026-11-14
disinfo.cloudflareaccess.comNot in the scope2026-11-14

18,935 names are covered by the program's own scope; 2 were first seen this week. Names come from ProjectDiscovery's public Chaos dataset (passive sources: certificate logs, DNS and other public data), matched to the program by its listing and its own domain scope. A name being in a dataset is not permission to test it: only what the program's own scope says is in scope, and its policy decides. CyberSIXT does not resolve, probe or scan these names. Tags come from the name alone. Source: ProjectDiscovery Chaos. Subdomains on the Atlas, or search the subdomains of every program.

A name in a dataset is not permission to test it: the program's own scope and rules decide. Data as of 2026-11-15.

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