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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
disneyresidents.cloudflareaccess.comNot in the scope2026-11-14
distilled.cloudflareaccess.comNot in the scope2026-11-14
dixonservers.cloudflareaccess.comNot in the scope2026-11-14
diygod.cloudflareaccess.comNot in the scope2026-11-14
dj52k.cloudflareaccess.comNot in the scope2026-11-14
djeon2684.cloudflareaccess.comNot in the scope2026-11-14
djweber.cloudflareaccess.comNot in the scope2026-11-14
dldev.cloudflareaccess.comNot in the scope2026-11-14
dmpl.cloudflareaccess.comNot in the scope2026-11-14
dnacloud.cloudflareaccess.comNot in the scope2026-11-14
dnm.cloudflareaccess.comNot in the scope2026-11-14
dns.cloudflareaccess.comNot in the scope2026-11-14
dns1.cloudflareaccess.comNot in the scope2026-11-14
dns2.cloudflareaccess.comNot in the scope2026-11-14
do-droplet-dt.cloudflareaccess.comNot in the scope2026-11-14
dobrymechanik.cloudflareaccess.comNot in the scope2026-11-14
docker.cloudflareaccess.comtoolsNot in the scope2026-11-14
dockside.cloudflareaccess.comNot in the scope2026-11-14
docmein.cloudflareaccess.comNot in the scope2026-11-14
doctolib.cloudflareaccess.comNot in the scope2026-11-14
doctolib-e2ee.cloudflareaccess.comNot in the scope2026-11-14
doduae.cloudflareaccess.comNot in the scope2026-11-14
dogchef.cloudflareaccess.comNot in the scope2026-11-14
dogecoinpr.cloudflareaccess.comNot in the scope2026-11-14
dogfood-dev.cloudflareaccess.comdevNot in the scope2026-11-14
dogjaunt.cloudflareaccess.comNot in the scope2026-11-14
domain.cloudflareaccess.comNot in the scope2026-11-14
domenuj.cloudflareaccess.comNot in the scope2026-11-14
domenujsk.cloudflareaccess.comNot in the scope2026-11-14
domoreco.cloudflareaccess.comNot in the scope2026-11-14
donesi.cloudflareaccess.comNot in the scope2026-11-14
donluigis.cloudflareaccess.comNot in the scope2026-11-14
dooblerrrrr.cloudflareaccess.comNot in the scope2026-11-14
doodle.cloudflareaccess.comNot in the scope2026-11-14
dooley.cloudflareaccess.comNot in the scope2026-11-14
doolib.cloudflareaccess.comNot in the scope2026-11-14
doppler.cloudflareaccess.comNot in the scope2026-11-14
dotdigital.cloudflareaccess.comNot in the scope2026-11-14
dotdot.cloudflareaccess.comNot in the scope2026-11-14
downfall24.cloudflareaccess.comNot in the scope2026-11-14
download.cloudflareaccess.comNot in the scope2026-11-14
dozafamily.cloudflareaccess.comNot in the scope2026-11-14
dprconstruction.cloudflareaccess.comNot in the scope2026-11-14
dragonpay.cloudflareaccess.comNot in the scope2026-11-14
drake.cloudflareaccess.comNot in the scope2026-11-14
drakeorguk.cloudflareaccess.comNot in the scope2026-11-14
drawbridge.cloudflareaccess.comNot in the scope2026-11-14
dreambound.cloudflareaccess.comNot in the scope2026-11-14
dreamsloth.cloudflareaccess.comNot in the scope2026-11-14
dreamsltd.cloudflareaccess.comNot in the scope2026-11-14
dreamzoo2.cloudflareaccess.comNot in the scope2026-11-14
dreamzoo2-old.cloudflareaccess.comlegacyNot in the scope2026-11-14
dreu.cloudflareaccess.comNot in the scope2026-11-14
drfcaron.cloudflareaccess.comNot in the scope2026-11-14
drilldev.cloudflareaccess.comNot in the scope2026-11-14
drinklmnt.cloudflareaccess.comNot in the scope2026-11-14
drinkwine.cloudflareaccess.comNot in the scope2026-11-14
drivvninfra.cloudflareaccess.comNot in the scope2026-11-14
dropletmedia.cloudflareaccess.comNot in the scope2026-11-14
drugbank.cloudflareaccess.comNot in the scope2026-11-14
drundo.cloudflareaccess.comNot in the scope2026-11-14
ds-cl.cloudflareaccess.comNot in the scope2026-11-14
dshafik.cloudflareaccess.comNot in the scope2026-11-14
dslmotors.cloudflareaccess.comNot in the scope2026-11-14
dsplce.cloudflareaccess.comNot in the scope2026-11-14
dst-dev.cloudflareaccess.comdevNot in the scope2026-11-14
dstvafrica.cloudflareaccess.comNot in the scope2026-11-14
dt.cloudflareaccess.comNot in the scope2026-11-14
dtnl.cloudflareaccess.comNot in the scope2026-11-14
dtwr.cloudflareaccess.comNot in the scope2026-11-14
duanyll.cloudflareaccess.comNot in the scope2026-11-14
duelbox.cloudflareaccess.comNot in the scope2026-11-14
dummy.cloudflareaccess.comNot in the scope2026-11-14
dumpcave.cloudflareaccess.comNot in the scope2026-11-14
duncanogilvie.cloudflareaccess.comNot in the scope2026-11-14
dunder.cloudflareaccess.comNot in the scope2026-11-14
duobank.cloudflareaccess.comNot in the scope2026-11-14
duokey.cloudflareaccess.comNot in the scope2026-11-14
dustri.cloudflareaccess.comNot in the scope2026-11-14
dvx-zero-trust.cloudflareaccess.comNot in the scope2026-11-14
dwf-labs.cloudflareaccess.comNot in the scope2026-11-14
dxcctestlab.cloudflareaccess.comNot in the scope2026-11-14
dyn.cloudflareaccess.comNot in the scope2026-11-14
dynamica.cloudflareaccess.comNot in the scope2026-11-14
dynamiccatholic.cloudflareaccess.comNot in the scope2026-11-14
dynamics-regensburg.cloudflareaccess.comNot in the scope2026-11-14
e-kierowca.cloudflareaccess.comNot in the scope2026-11-14
eagubar.cloudflareaccess.comNot in the scope2026-11-14
earmilk.cloudflareaccess.comNot in the scope2026-11-14
eastontech.cloudflareaccess.comNot in the scope2026-11-14
eastwoodrefurb.cloudflareaccess.comNot in the scope2026-11-14
easuryinc.cloudflareaccess.comNot in the scope2026-11-14
easycannabis.cloudflareaccess.comNot in the scope2026-11-14
easyguideapp.cloudflareaccess.comNot in the scope2026-11-14
easymine.cloudflareaccess.comNot in the scope2026-11-14
eatonworks.cloudflareaccess.comNot in the scope2026-11-14
eben-gilkenson-pages.cloudflareaccess.comNot in the scope2026-11-14
ecboces.cloudflareaccess.comNot in the scope2026-11-14
ecctis.cloudflareaccess.comNot in the scope2026-11-14
echolabs.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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