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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
indexer-staging.ipfs.cloudflare.comstagingIn scope2026-11-14
advertisements.indexer-staging.ipfs.cloudflare.comstagingIn scope2026-11-14
advertisements.indexer.ipfs.cloudflare.comIn scope2026-11-14
superr2test.indexer.ipfs.cloudflare.comtestIn scope2026-11-14
onboarding.ipfs.cloudflare.comIn scope2026-11-14
peerlist.ipfs.cloudflare.comIn scope2026-11-14
staging.ipfs.cloudflare.comstagingIn scope2026-11-14
universal-gateway.ipfs.cloudflare.comIn scope2026-11-14
isp.cloudflare.comIn scope2026-11-14
isp-staging.cloudflare.comstagingIn scope2026-11-14
dash.isp-staging.cloudflare.comstagingIn scope2026-11-14
backbone-map.isp.cloudflare.comIn scope2026-11-14
dash.isp.cloudflare.comIn scope2026-11-14
fishbone.isp.cloudflare.comIn scope2026-11-14
infra.isp.cloudflare.comIn scope2026-11-14
ix-dashboard.isp.cloudflare.comadminIn scope2026-11-14
peeringdb.isp.cloudflare.comIn scope2026-11-14
peeringdb-mcp.isp.cloudflare.comIn scope2026-11-14
peeringdb-staging.isp.cloudflare.comstagingIn scope2026-11-14
demo-pat.issuer.cloudflare.comtestIn scope2026-11-14
dev.demo-pat.issuer.cloudflare.comdev, testIn scope2026-11-14
public-pat.issuer.cloudflare.comIn scope2026-11-14
it.cloudflare.comIn scope2026-11-14
jamelia.cloudflare.comIn scope2026-11-14
james.cloudflare.comIn scope2026-11-14
jobs.cloudflare.comIn scope2026-11-14
jonny.cloudflare.comIn scope2026-11-14
jp.cloudflare.comIn scope2026-11-14
js.cloudflare.comIn scope2026-11-14
cdn.js.cloudflare.comIn scope2026-11-14
jscdn.cloudflare.comIn scope2026-11-14
jquery.mobile.custom.min.jscdnjs.cloudflare.comIn scope2026-11-14
ns.kay.cloudflare.comIn scope2026-11-14
key-transparency.cloudflare.comIn scope2026-11-14
dash.key-transparency.cloudflare.comIn scope2026-11-14
plexi.key-transparency.cloudflare.comIn scope2026-11-14
plexi-dev.key-transparency.cloudflare.comdevIn scope2026-11-14
plexi-staging.key-transparency.cloudflare.comstagingIn scope2026-11-14
staging-dash.key-transparency.cloudflare.comstagingIn scope2026-11-14
kim.cloudflare.comIn scope2026-11-14
nx.kip.cloudflare.comIn scope2026-11-14
knight.cloudflare.comIn scope2026-11-14
ko.cloudflare.comIn scope2026-11-14
kolin.cloudflare.comIn scope2026-11-14
koloss.cloudflare.comIn scope2026-11-14
labs.cloudflare.comIn scope2026-11-14
labs-staging.cloudflare.comstagingIn scope2026-11-14
api.labs-staging.cloudflare.comapi, stagingIn scope2026-11-14
apjc.labs-staging.cloudflare.comstagingIn scope2026-11-14
apjc-v2.labs-staging.cloudflare.comstagingIn scope2026-11-14
apwest.labs-staging.cloudflare.comstagingIn scope2026-11-14
astriddb.labs-staging.cloudflare.comstagingIn scope2026-11-14
aueast.labs-staging.cloudflare.comstagingIn scope2026-11-14
cml-active-pod-evaluator-staging.labs-staging.cloudflare.comstagingIn scope2026-11-14
cml-euwest-canary-b.labs-staging.cloudflare.comstagingIn scope2026-11-14
cml-sso-proxy.labs-staging.cloudflare.comauth, stagingIn scope2026-11-14
cml-sso-proxy-orig.labs-staging.cloudflare.comauth, stagingIn scope2026-11-14
cms.labs-staging.cloudflare.comadmin, stagingIn scope2026-11-14
cms-api.labs-staging.cloudflare.comadmin, api, stagingIn scope2026-11-14
cms2.labs-staging.cloudflare.comadmin, stagingIn scope2026-11-14
content.labs-staging.cloudflare.comstagingIn scope2026-11-14
demo-api.labs-staging.cloudflare.comapi, staging, testIn scope2026-11-14
eunorth.labs-staging.cloudflare.comstagingIn scope2026-11-14
euwest.labs-staging.cloudflare.comstagingIn scope2026-11-14
euwest-canary.labs-staging.cloudflare.comstagingIn scope2026-11-14
euwest-canary-proxy.labs-staging.cloudflare.comstagingIn scope2026-11-14
euwest-canary-ssh.labs-staging.cloudflare.comstagingIn scope2026-11-14
rdp.euwest-canary.labs-staging.cloudflare.comstaging, vpnIn scope2026-11-14
tokengen.euwest-canary.labs-staging.cloudflare.comstagingIn scope2026-11-14
ide.labs-staging.cloudflare.comstagingIn scope2026-11-14
ide-canary.labs-staging.cloudflare.comstagingIn scope2026-11-14
ide-container.labs-staging.cloudflare.comstagingIn scope2026-11-14
ide-test.labs-staging.cloudflare.comstaging, testIn scope2026-11-14
idp.labs-staging.cloudflare.comauth, stagingIn scope2026-11-14
idp-rag.labs-staging.cloudflare.comauth, stagingIn scope2026-11-14
apjc.labs.labs-staging.cloudflare.comstagingIn scope2026-11-14
apwest.labs.labs-staging.cloudflare.comstagingIn scope2026-11-14
aueast.labs.labs-staging.cloudflare.comstagingIn scope2026-11-14
euwest.labs.labs-staging.cloudflare.comstagingIn scope2026-11-14
uscentral.labs.labs-staging.cloudflare.comstagingIn scope2026-11-14
uswest.labs.labs-staging.cloudflare.comstagingIn scope2026-11-14
media.labs-staging.cloudflare.comstagingIn scope2026-11-14
poppy-tried-catnap.labs-staging.cloudflare.comstagingIn scope2026-11-14
r2.labs-staging.cloudflare.comstagingIn scope2026-11-14
saml-auto.labs-staging.cloudflare.comauth, stagingIn scope2026-11-14
saml-sso-auto.labs-staging.cloudflare.comauth, stagingIn scope2026-11-14
sputter-wilt-ipod-oversized.labs-staging.cloudflare.comstagingIn scope2026-11-14
cml-euwest-canary-b.ssh.labs-staging.cloudflare.comstagingIn scope2026-11-14
sso-auto.labs-staging.cloudflare.comauth, stagingIn scope2026-11-14
sso-proxy.labs-staging.cloudflare.comauth, stagingIn scope2026-11-14
client.sso.labs-staging.cloudflare.comauth, stagingIn scope2026-11-14
staging.labs-staging.cloudflare.comstagingIn scope2026-11-14
terrasoup.labs-staging.cloudflare.comstagingIn scope2026-11-14
uscentral.labs-staging.cloudflare.comstagingIn scope2026-11-14
wasmssh.uscentral.labs-staging.cloudflare.comstagingIn scope2026-11-14
uswest.labs-staging.cloudflare.comstagingIn scope2026-11-14
uswest-one.labs-staging.cloudflare.comstagingIn scope2026-11-14
v2.labs-staging.cloudflare.comstagingIn scope2026-11-14
apjc.v2.labs-staging.cloudflare.comstagingIn scope2026-11-14
content.v2.labs-staging.cloudflare.comstagingIn 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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