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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
Scope
Name suggests
First seen
Text file24,298 names
Subdomains of Cloudflare Public Bug Bounty
NameScopeFirst seen
mimi.ns.cloudflare.comIn scope2026-11-14
mina.ns.cloudflare.comIn scope2026-11-14
mini.ns.cloudflare.comIn scope2026-11-14
mira.ns.cloudflare.comIn scope2026-11-14
mitch.ns.cloudflare.comIn scope2026-11-14
mitchell.ns.cloudflare.comIn scope2026-11-14
molly.ns.cloudflare.comIn scope2026-11-14
mon.ns.cloudflare.comIn scope2026-11-14
mona.ns.cloudflare.comIn scope2026-11-14
monika.ns.cloudflare.comIn scope2026-11-14
monroe.ns.cloudflare.comIn scope2026-11-14
morena.ns.cloudflare.comIn scope2026-11-14
morgan.ns.cloudflare.comIn scope2026-11-14
mountdoom.ns.cloudflare.comIn scope2026-11-14
moura.ns.cloudflare.comIn scope2026-11-14
mustafa.ns.cloudflare.comIn scope2026-11-14
my.ns.cloudflare.comIn scope2026-11-14
mya.ns.cloudflare.comIn scope2026-11-14
n.ns.cloudflare.comIn scope2026-11-14
nadam.ns.cloudflare.comIn scope2026-11-14
nadia.ns.cloudflare.comIn scope2026-11-14
nailaccenadia.ns.cloudflare.comIn scope2026-11-14
nancy.ns.cloudflare.comIn scope2026-11-14
nani.ns.cloudflare.comIn scope2026-11-14
naomi.ns.cloudflare.comIn scope2026-11-14
nars.ns.cloudflare.comIn scope2026-11-14
nash.ns.cloudflare.comIn scope2026-11-14
nataly.ns.cloudflare.comIn scope2026-11-14
natasha.ns.cloudflare.comIn scope2026-11-14
naya.ns.cloudflare.comIn scope2026-11-14
ned.ns.cloudflare.comIn scope2026-11-14
neil.ns.cloudflare.comIn scope2026-11-14
nelci.ns.cloudflare.comIn scope2026-11-14
nelly.ns.cloudflare.comIn scope2026-11-14
nena.ns.cloudflare.comIn scope2026-11-14
nero.ns.cloudflare.comIn scope2026-11-14
ns1.cp-in-2.webhostbox.netaragorn.ns.cloudflare.comIn scope2026-11-14
newt.ns.cloudflare.comIn scope2026-11-14
newth.ns.cloudflare.comIn scope2026-11-14
neza.ns.cloudflare.comIn scope2026-11-14
ngina.ns.cloudflare.comIn scope2026-11-14
nia.ns.cloudflare.comIn scope2026-11-14
nibs.ns.cloudflare.comIn scope2026-11-14
nick.ns.cloudflare.comIn scope2026-11-14
niclode.ns.cloudflare.comIn scope2026-11-14
nico.ns.cloudflare.comIn scope2026-11-14
nicolas.ns.cloudflare.comIn scope2026-11-14
nicole.ns.cloudflare.comIn scope2026-11-14
nikon.ns.cloudflare.comIn scope2026-11-14
nile.ns.cloudflare.comIn scope2026-11-14
nilessssss.ns.cloudflare.comIn scope2026-11-14
nina.ns.cloudflare.comIn scope2026-11-14
nitic.ns.cloudflare.comIn scope2026-11-14
nitin.ns.cloudflare.comIn scope2026-11-14
nlorna.ns.cloudflare.comIn scope2026-11-14
noah.ns.cloudflare.comIn scope2026-11-14
noel.ns.cloudflare.comIn scope2026-11-14
noia.ns.cloudflare.comIn scope2026-11-14
nola.ns.cloudflare.comIn scope2026-11-14
nolan.ns.cloudflare.comIn scope2026-11-14
noor.ns.cloudflare.comIn scope2026-11-14
nora.ns.cloudflare.comIn scope2026-11-14
norah.ns.cloudflare.comIn scope2026-11-14
norm.ns.cloudflare.comIn scope2026-11-14
norman.ns.cloudflare.comIn scope2026-11-14
nova.ns.cloudflare.comIn scope2026-11-14
novalee.ns.cloudflare.comIn scope2026-11-14
ns-jake.ns.cloudflare.comIn scope2026-11-14
jake.ns-marge.ns.cloudflare.comIn scope2026-11-14
ada.nsada.ns.cloudflare.comIn scope2026-11-14
ns1.anycast.vncns523.hostgator.comeric.nschris.ns.cloudflare.comIn scope2026-11-14
cory.nscory.ns.cloudflare.comIn scope2026-11-14
cory.nscory.nscory.nscory.ns.cloudflare.comIn scope2026-11-14
dara.nsdara.ns.cloudflare.comIn scope2026-11-14
nsfay.ns.cloudflare.comIn scope2026-11-14
nsgreg.ns.cloudflare.comIn scope2026-11-14
nshugh.ns.cloudflare.comIn scope2026-11-14
john.nsjohn.ns.cloudflare.comIn scope2026-11-14
nskara.ns.cloudflare.comIn scope2026-11-14
kirk.nskirk.ns.cloudflare.comIn scope2026-11-14
amit.nslara.ns.cloudflare.comIn scope2026-11-14
linda.nslinda.ns.cloudflare.comIn scope2026-11-14
marjory.nsmarjory.ns.cloudflare.comIn scope2026-11-14
ray.nsray.ns.cloudflare.comIn scope2026-11-14
rihana.nsrihana.ns.cloudflare.comIn scope2026-11-14
ns2.anycast.vncns524.hostgator.comerin.nsrose.ns.cloudflare.comIn scope2026-11-14
donna.nssid.ns.cloudflare.comIn scope2026-11-14
sid.nssid.ns.cloudflare.comIn scope2026-11-14
nswoz.ns.cloudflare.comIn scope2026-11-14
nucum.ns.cloudflare.comIn scope2026-11-14
oaklyn.ns.cloudflare.comIn scope2026-11-14
odin.ns.cloudflare.comIn scope2026-11-14
ody.ns.cloudflare.comIn scope2026-11-14
olga.ns.cloudflare.comIn scope2026-11-14
olivia.ns.cloudflare.comIn scope2026-11-14
ollie.ns.cloudflare.comIn scope2026-11-14
olof.ns.cloudflare.comIn scope2026-11-14
om.ns.cloudflare.comIn scope2026-11-14
opal.ns.cloudflare.comIn scope2026-11-14
ophelia.ns.cloudflare.comIn 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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