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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
24,296
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 Problem#1952124No weakness recorded2023-06-07$3,30097
Using special IPv4-mapped IPv6 addresses to bypass local IP ban#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 Forwarding#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 it#3211031Cross-site Scripting2025-09-30$55075
Yet Another CASB Integration Takeover of Active Integrations#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 AccessTempAuth#3423950Cross-site Scripting2026-04-14–63
AI Playground XSS to steal user-chat messages and access to connected MCP Server#3424998Cross-site Scripting2026-02-26–62
Bypass R2 payment screen#2170559Authentication2023-11-10$35057

Subdomains24,296

Root
Scope
Name suggests
First seen
Text file24,296 names
Subdomains of Cloudflare Public Bug Bounty
NameScopeFirst seen
eth0.omsdp14002.1-223-207.cloudflare.comIn scope2026-11-14
111cdnjs.cloudflare.comIn scope2026-11-14
67.219.100.117.cloudflare.comIn scope2026-11-14
45.77.72.125.cloudflare.comIn scope2026-11-14
45.32.232.13.cloudflare.comIn scope2026-11-14
59.163.0.161.cloudflare.comIn scope2026-11-14
cf.34.1637.cloudflare.comIn scope2026-11-14
45.32.67.168.cloudflare.comIn scope2026-11-14
52.88.74.175cdnjs.cloudflare.comIn scope2026-11-14
19-190-93-255-13.cloudflare.comIn scope2026-11-14
190-92-3-240-239.cloudflare.comIn scope2026-11-14
1903-240-169.cloudflare.comIn scope2026-11-14
2.cloudflare.comIn scope2026-11-14
cf-development.2-123.cloudflare.comdevIn scope2026-11-14
213-dns.cloudflare.comIn scope2026-11-14
216-dns.cloudflare.comIn scope2026-11-14
217-dns.cloudflare.comIn scope2026-11-14
218-dns.cloudflare.comIn scope2026-11-14
219-dns.cloudflare.comIn scope2026-11-14
220-dns.cloudflare.comIn scope2026-11-14
220-server22730-speedy.cloudflare.comIn scope2026-11-14
221-dns.cloudflare.comIn scope2026-11-14
222-dns.cloudflare.comIn scope2026-11-14
2cdnjs.cloudflare.comIn scope2026-11-14
wanda.2ns.cloudflare.comIn scope2026-11-14
cf.34.564a.3-245-55-177.cloudflare.comIn scope2026-11-14
cf-protected-www.3-255-186.cloudflare.comIn scope2026-11-14
32.cloudflare.comIn scope2026-11-14
cf.47.335-61-175.cloudflare.comIn scope2026-11-14
cf.4c.38a95-62-232.cloudflare.comIn scope2026-11-14
448372-waw-edge-10g.cloudflare.comIn scope2026-11-14
35.189.145.45cdnjs.cloudflare.comIn scope2026-11-14
4ns.cloudflare.comIn scope2026-11-14
cf.52.5-62-76.cloudflare.comIn scope2026-11-14
5ns.cloudflare.comIn scope2026-11-14
618820-waw-edge-10g.cloudflare.comIn scope2026-11-14
52.12.176.64.cloudflare.comIn scope2026-11-14
193.149.30.6cdnjs.cloudflare.comIn scope2026-11-14
cf-173-245-48-204.73-245-50-127.cloudflare.comIn scope2026-11-14
8.cloudflare.comIn scope2026-11-14
31.236.239.85.cloudflare.comIn scope2026-11-14
8ns.cloudflare.comIn scope2026-11-14
925372-msk-edge-10g.cloudflare.comIn scope2026-11-14
140.82.33.93.cloudflare.comIn scope2026-11-14
977523-buc-edge-10g.cloudflare.comIn scope2026-11-14
_dmarc.cloudflare.comIn scope2026-11-14
cf-protected-www.a7-128-201.cloudflare.comIn scope2026-11-14
abuse.cloudflare.comIn scope2026-11-14
japan.abuse.cloudflare.comIn scope2026-11-14
staging.abuse.cloudflare.comstagingIn scope2026-11-14
japan.staging.abuse.cloudflare.comstagingIn scope2026-11-14
levi.staging.abuse.cloudflare.comstagingIn scope2026-11-14
access.cloudflare.comvpnIn scope2026-11-14
ad3c6b.cloudflare.comIn scope2026-11-14
admin.cloudflare.comadminIn scope2026-11-14
agentmemory.cloudflare.comIn scope2026-11-14
agentmemory-staging.cloudflare.comstagingIn scope2026-11-14
agentready.cloudflare.comIn scope2026-11-14
agents.cloudflare.comIn scope2026-11-14
gateway.agents.cloudflare.comIn scope2026-11-14
beta.gateway.agents.cloudflare.comstagingIn scope2026-11-14
eduardo.gateway.agents.cloudflare.comIn scope2026-11-14
fpw-staging.gateway.agents.cloudflare.comstagingIn scope2026-11-14
isaac.gateway.agents.cloudflare.comIn scope2026-11-14
james.gateway.agents.cloudflare.comIn scope2026-11-14
jenny.gateway.agents.cloudflare.comIn scope2026-11-14
jesse.gateway.agents.cloudflare.comIn scope2026-11-14
kennyatx.gateway.agents.cloudflare.comIn scope2026-11-14
matt.gateway.agents.cloudflare.comIn scope2026-11-14
mcp114-fixture.gateway.agents.cloudflare.comIn scope2026-11-14
mcp285-fixture.gateway.agents.cloudflare.comIn scope2026-11-14
mcp285-harness.gateway.agents.cloudflare.comIn scope2026-11-14
miguel.gateway.agents.cloudflare.comIn scope2026-11-14
mike.gateway.agents.cloudflare.comIn scope2026-11-14
oscar.gateway.agents.cloudflare.comIn scope2026-11-14
scarlett.gateway.agents.cloudflare.comIn scope2026-11-14
scarlett-staging.gateway.agents.cloudflare.comstagingIn scope2026-11-14
shahed.gateway.agents.cloudflare.comIn scope2026-11-14
staging.gateway.agents.cloudflare.comstagingIn scope2026-11-14
testing.gateway.agents.cloudflare.comtestIn scope2026-11-14
tim.gateway.agents.cloudflare.comIn scope2026-11-14
provisioning.agents.cloudflare.comIn scope2026-11-14
preview.provisioning.agents.cloudflare.comstagingIn scope2026-11-14
stripe.provisioning.agents.cloudflare.comIn scope2026-11-14
stripe-app.provisioning.agents.cloudflare.comIn scope2026-11-14
ai.cloudflare.comIn scope2026-11-14
autorag.ai.cloudflare.comIn scope2026-11-14
assets.autorag.ai.cloudflare.comIn scope2026-11-14
commerce.ai.cloudflare.comIn scope2026-11-14
gateway.ai.cloudflare.comIn scope2026-11-14
gateway-beta.ai.cloudflare.comstagingIn scope2026-11-14
production.gateway.ai.cloudflare.comIn scope2026-11-14
multi-modal.ai.cloudflare.comIn scope2026-11-14
playground.ai.cloudflare.comListed out of scope2026-11-14
playground-mcp-sandbox.ai.cloudflare.comtestIn scope2026-11-14
rag.ai.cloudflare.comIn scope2026-11-14
run.ai.cloudflare.comIn scope2026-11-14
panthera.run.ai.cloudflare.comIn scope2026-11-14
panthera-dev.run.ai.cloudflare.comdevIn scope2026-11-14
search.ai.cloudflare.comIn scope2026-11-14

18,933 names are covered by the program's own scope; 0 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 2026-11-14.

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