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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:cloudflare.com
Scope
Name suggests:Staging
First seen
Text fileClear filters346 names
Subdomains of Cloudflare Public Bug Bounty
NameScopeFirst seen
staging.abuse.cloudflare.comstagingIn scope2026-11-14
japan.staging.abuse.cloudflare.comstagingIn scope2026-11-14
levi.staging.abuse.cloudflare.comstagingIn scope2026-11-14
agentmemory-staging.cloudflare.comstagingIn scope2026-11-14
beta.gateway.agents.cloudflare.comstagingIn scope2026-11-14
fpw-staging.gateway.agents.cloudflare.comstagingIn scope2026-11-14
scarlett-staging.gateway.agents.cloudflare.comstagingIn scope2026-11-14
staging.gateway.agents.cloudflare.comstagingIn scope2026-11-14
preview.provisioning.agents.cloudflare.comstagingIn scope2026-11-14
gateway-beta.ai.cloudflare.comstagingIn scope2026-11-14
staging.search.ai.cloudflare.comstagingIn scope2026-11-14
examples-staging.aig.cloudflare.comstagingIn scope2026-11-14
staging.akd-auditor.cloudflare.comstagingIn scope2026-11-14
canary.gateway.api.cloudflare.comapi, stagingIn scope2026-11-14
staging.apple-carry-relay.cloudflare.comstagingIn scope2026-11-14
staging.apple-relay.cloudflare.comstagingIn scope2026-11-14
vpc.staging.aws-flow-logs-federal.cloudflare.commonitoring, stagingIn scope2026-11-14
blog-staging.cloudflare.comstagingIn scope2026-11-14
staging.blog.cloudflare.comstagingIn scope2026-11-14
staging.cac.cloudflare.comstagingIn scope2026-11-14
downloads.staging.cac.cloudflare.comstagingIn scope2026-11-14
maps.staging.cac.cloudflare.comstagingIn scope2026-11-14
ui-maps.staging.cac.cloudflare.comstagingIn scope2026-11-14
preview-amp-dev.cdn.cloudflare.comdev, stagingIn scope2026-11-14
cdnjs-staging.cloudflare.comstagingIn scope2026-11-14
staging.admin.certifications.cloudflare.comadmin, stagingIn scope2026-11-14
staging.certifications.cloudflare.comstagingIn scope2026-11-14
certvalidate-staging.cloudflare.comstagingIn scope2026-11-14
challenges-staging.cloudflare.comstagingIn scope2026-11-14
staging.community.cloudflare.comstagingIn scope2026-11-14
staging.cp12.cloudflare.comstagingIn scope2026-11-14
staging.cp3.cloudflare.comstagingIn scope2026-11-14
cp4-canary.cloudflare.comstagingIn scope2026-11-14
cp8-staging.cloudflare.comstagingIn scope2026-11-14
staging.cp9.cloudflare.comstagingIn scope2026-11-14
staging.dap.cloudflare.comstagingIn scope2026-11-14
canary.one.dash.cloudflare.comstagingIn scope2026-11-14
preview.one.dash.cloudflare.comstagingIn scope2026-11-14
dcvcheck-staging.cloudflare.comstagingIn scope2026-11-14
staging.developers.cloudflare.comstagingIn scope2026-11-14
staging.devices.cloudflare.comstagingIn scope2026-11-14
staging.dex.cloudflare.comstagingIn scope2026-11-14
admin.staging.dex.cloudflare.comadmin, stagingIn scope2026-11-14
edge-api.staging.dex.cloudflare.comapi, stagingIn scope2026-11-14
editor-staging.cloudflare.comstagingIn scope2026-11-14
scm.editor-staging.cloudflare.comgit, stagingIn scope2026-11-14
staging.ethereum.cloudflare.comstagingIn scope2026-11-14
gw.staging.ethereum.cloudflare.comstagingIn scope2026-11-14
lb-test.staging.ethereum.cloudflare.comstaging, testIn scope2026-11-14
staging.devices.fed.cloudflare.comstagingIn scope2026-11-14
api-staging.notifications.fed.cloudflare.comapi, stagingIn scope2026-11-14
staging.registry.fed.cloudflare.comstaging, toolsIn scope2026-11-14
api.staging.fed.cloudflare.comapi, stagingIn scope2026-11-14
edge-iapi-certs-staging.api.staging.fed.cloudflare.comapi, stagingIn scope2026-11-14
dash.staging.fed.cloudflare.comstagingIn scope2026-11-14
one.dash.staging.fed.cloudflare.comstagingIn scope2026-11-14
platform.dash.staging.fed.cloudflare.comstagingIn scope2026-11-14
staging.ssf.risk-score.teams.fed.cloudflare.comstagingIn scope2026-11-14
staging.gates.cloudflare.comstagingIn scope2026-11-14
ingest-staging.cloudflare.comstagingIn scope2026-11-14
api.staging.integrations.cloudflare.comapi, stagingIn scope2026-11-14
cf1.staging.integrations.cloudflare.comstagingIn scope2026-11-14
indexer-staging.ipfs.cloudflare.comstagingIn scope2026-11-14
advertisements.indexer-staging.ipfs.cloudflare.comstagingIn scope2026-11-14
staging.ipfs.cloudflare.comstagingIn scope2026-11-14
isp-staging.cloudflare.comstagingIn scope2026-11-14
dash.isp-staging.cloudflare.comstagingIn scope2026-11-14
peeringdb-staging.isp.cloudflare.comstagingIn scope2026-11-14
plexi-staging.key-transparency.cloudflare.comstagingIn scope2026-11-14
staging-dash.key-transparency.cloudflare.comstagingIn 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

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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