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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
jettdigitals.cloudflareaccess.comNot in the scope2026-11-14
jetzterstecht.cloudflareaccess.comNot in the scope2026-11-14
jewelryexchangedallas.cloudflareaccess.comNot in the scope2026-11-14
jezalsec.cloudflareaccess.comNot in the scope2026-11-14
jgive.cloudflareaccess.comNot in the scope2026-11-14
jht.cloudflareaccess.comNot in the scope2026-11-14
jianqing.cloudflareaccess.comNot in the scope2026-11-14
jibt3ch.cloudflareaccess.comNot in the scope2026-11-14
jigsawtrading.cloudflareaccess.comNot in the scope2026-11-14
jimo.cloudflareaccess.comNot in the scope2026-11-14
jivetel.cloudflareaccess.comNot in the scope2026-11-14
jk.cloudflareaccess.comNot in the scope2026-11-14
jkasten.cloudflareaccess.comNot in the scope2026-11-14
jmur.cloudflareaccess.comNot in the scope2026-11-14
jnraptor.cloudflareaccess.comNot in the scope2026-11-14
jns.cloudflareaccess.comNot in the scope2026-11-14
joaosantos-ic.cloudflareaccess.comNot in the scope2026-11-14
joaquin.cloudflareaccess.comNot in the scope2026-11-14
job.cloudflareaccess.comNot in the scope2026-11-14
jobdekker.cloudflareaccess.comNot in the scope2026-11-14
jobdig.cloudflareaccess.comNot in the scope2026-11-14
jobs.cloudflareaccess.comNot in the scope2026-11-14
joesieve.cloudflareaccess.comNot in the scope2026-11-14
joeytest.cloudflareaccess.comNot in the scope2026-11-14
jogaorba.cloudflareaccess.comNot in the scope2026-11-14
john-mccracken.cloudflareaccess.comNot in the scope2026-11-14
johncherry.cloudflareaccess.comNot in the scope2026-11-14
johndball.cloudflareaccess.comNot in the scope2026-11-14
johngeaney.cloudflareaccess.comNot in the scope2026-11-14
johnhoke.cloudflareaccess.comNot in the scope2026-11-14
joker.cloudflareaccess.comNot in the scope2026-11-14
jonasgloning.cloudflareaccess.comNot in the scope2026-11-14
jonathonyoungquist.cloudflareaccess.comNot in the scope2026-11-14
joomlatools.cloudflareaccess.comNot in the scope2026-11-14
jose.cloudflareaccess.comNot in the scope2026-11-14
joseleos.cloudflareaccess.comNot in the scope2026-11-14
josenovais.cloudflareaccess.comNot in the scope2026-11-14
joshnz.cloudflareaccess.comNot in the scope2026-11-14
joshuaavalon.cloudflareaccess.comNot in the scope2026-11-14
joshwuflestad.cloudflareaccess.comNot in the scope2026-11-14
josuetxanizcom.cloudflareaccess.comNot in the scope2026-11-14
joulzen.cloudflareaccess.comNot in the scope2026-11-14
joystack.cloudflareaccess.comNot in the scope2026-11-14
joytree.cloudflareaccess.comNot in the scope2026-11-14
jpederson.cloudflareaccess.comNot in the scope2026-11-14
jpnet-infra.cloudflareaccess.comNot in the scope2026-11-14
jrmyfranck.cloudflareaccess.comNot in the scope2026-11-14
jsmsr.cloudflareaccess.comNot in the scope2026-11-14
jsupp.cloudflareaccess.comNot in the scope2026-11-14
jtai.cloudflareaccess.comNot in the scope2026-11-14
jtcressy.cloudflareaccess.comNot in the scope2026-11-14
jti.cloudflareaccess.comNot in the scope2026-11-14
jula.cloudflareaccess.comNot in the scope2026-11-14
julietfoxtrot.cloudflareaccess.comNot in the scope2026-11-14
jumia.cloudflareaccess.comNot in the scope2026-11-14
jumpycow.cloudflareaccess.comNot in the scope2026-11-14
jungfrau.cloudflareaccess.comNot in the scope2026-11-14
junkbox.cloudflareaccess.comNot in the scope2026-11-14
junor.cloudflareaccess.comNot in the scope2026-11-14
jur.cloudflareaccess.comNot in the scope2026-11-14
justalittlebyte.cloudflareaccess.comNot in the scope2026-11-14
justanotherdev.cloudflareaccess.comNot in the scope2026-11-14
justauto.cloudflareaccess.comNot in the scope2026-11-14
justblackmagic.cloudflareaccess.comNot in the scope2026-11-14
justeatforbusiness.cloudflareaccess.comNot in the scope2026-11-14
justframerail.cloudflareaccess.comNot in the scope2026-11-14
justidea.cloudflareaccess.comNot in the scope2026-11-14
jw.cloudflareaccess.comNot in the scope2026-11-14
jwalzer.cloudflareaccess.comNot in the scope2026-11-14
jwhthomas.cloudflareaccess.comNot in the scope2026-11-14
jwin.cloudflareaccess.comNot in the scope2026-11-14
jx02.cloudflareaccess.comNot in the scope2026-11-14
jyskebank.cloudflareaccess.comNot in the scope2026-11-14
k1090.cloudflareaccess.comNot in the scope2026-11-14
k554aexvt.cloudflareaccess.comNot in the scope2026-11-14
k8s.cloudflareaccess.comtoolsNot in the scope2026-11-14
kadirbelkuyu.cloudflareaccess.comNot in the scope2026-11-14
kafumisi.cloudflareaccess.comNot in the scope2026-11-14
kagybunch.cloudflareaccess.comNot in the scope2026-11-14
kailasa.cloudflareaccess.comNot in the scope2026-11-14
kaishyun.cloudflareaccess.comNot in the scope2026-11-14
kaita.cloudflareaccess.comNot in the scope2026-11-14
kalconix.cloudflareaccess.comNot in the scope2026-11-14
kalimdor.cloudflareaccess.comNot in the scope2026-11-14
kalixhealth.cloudflareaccess.comNot in the scope2026-11-14
kamelx.cloudflareaccess.comNot in the scope2026-11-14
kamigroup.cloudflareaccess.comNot in the scope2026-11-14
kanduc.cloudflareaccess.comNot in the scope2026-11-14
kansascitymo.cloudflareaccess.comNot in the scope2026-11-14
kaoh.cloudflareaccess.comNot in the scope2026-11-14
kaplaninternational.cloudflareaccess.comNot in the scope2026-11-14
kariera-singapore.cloudflareaccess.comNot in the scope2026-11-14
karthikvarma.cloudflareaccess.comNot in the scope2026-11-14
karyakarsa.cloudflareaccess.comNot in the scope2026-11-14
kaxmedia.cloudflareaccess.comNot in the scope2026-11-14
kayak-ztna.cloudflareaccess.comNot in the scope2026-11-14
kcc.cloudflareaccess.comNot in the scope2026-11-14
kcomain.cloudflareaccess.comNot in the scope2026-11-14
kddevs.cloudflareaccess.comNot in the scope2026-11-14
kdeamandel.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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