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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() function#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
www.klimacabs.co.ke.cdn.cloudflare.comIn scope2026-11-14
magic-gateway.cdn.cloudflare.comIn scope2026-11-14
magic-number-10.cdn.cloudflare.comIn scope2026-11-14
magic-number-101.cdn.cloudflare.comIn scope2026-11-14
magic-number-102.cdn.cloudflare.comIn scope2026-11-14
magic-number-103.cdn.cloudflare.comIn scope2026-11-14
magic-number-104.cdn.cloudflare.comIn scope2026-11-14
magic-number-107.cdn.cloudflare.comIn scope2026-11-14
magic-number-108.cdn.cloudflare.comIn scope2026-11-14
magic-number-109.cdn.cloudflare.comIn scope2026-11-14
magic-number-11.cdn.cloudflare.comIn scope2026-11-14
magic-number-112.cdn.cloudflare.comIn scope2026-11-14
magic-number-113.cdn.cloudflare.comIn scope2026-11-14
magic-number-114.cdn.cloudflare.comIn scope2026-11-14
magic-number-115.cdn.cloudflare.comIn scope2026-11-14
magic-number-119.cdn.cloudflare.comIn scope2026-11-14
magic-number-12.cdn.cloudflare.comIn scope2026-11-14
magic-number-120.cdn.cloudflare.comIn scope2026-11-14
magic-number-121.cdn.cloudflare.comIn scope2026-11-14
magic-number-123.cdn.cloudflare.comIn scope2026-11-14
magic-number-124.cdn.cloudflare.comIn scope2026-11-14
magic-number-125.cdn.cloudflare.comIn scope2026-11-14
magic-number-126.cdn.cloudflare.comIn scope2026-11-14
magic-number-127.cdn.cloudflare.comIn scope2026-11-14
magic-number-128.cdn.cloudflare.comIn scope2026-11-14
magic-number-13.cdn.cloudflare.comIn scope2026-11-14
magic-number-131.cdn.cloudflare.comIn scope2026-11-14
magic-number-132.cdn.cloudflare.comIn scope2026-11-14
magic-number-133.cdn.cloudflare.comIn scope2026-11-14
magic-number-134.cdn.cloudflare.comIn scope2026-11-14
magic-number-136.cdn.cloudflare.comIn scope2026-11-14
magic-number-137.cdn.cloudflare.comIn scope2026-11-14
magic-number-138.cdn.cloudflare.comIn scope2026-11-14
magic-number-139.cdn.cloudflare.comIn scope2026-11-14
magic-number-14.cdn.cloudflare.comIn scope2026-11-14
magic-number-141.cdn.cloudflare.comIn scope2026-11-14
magic-number-142.cdn.cloudflare.comIn scope2026-11-14
magic-number-143.cdn.cloudflare.comIn scope2026-11-14
magic-number-144.cdn.cloudflare.comIn scope2026-11-14
magic-number-145.cdn.cloudflare.comIn scope2026-11-14
magic-number-148.cdn.cloudflare.comIn scope2026-11-14
magic-number-149.cdn.cloudflare.comIn scope2026-11-14
magic-number-15.cdn.cloudflare.comIn scope2026-11-14
magic-number-150.cdn.cloudflare.comIn scope2026-11-14
magic-number-151.cdn.cloudflare.comIn scope2026-11-14
magic-number-152.cdn.cloudflare.comIn scope2026-11-14
magic-number-155.cdn.cloudflare.comIn scope2026-11-14
magic-number-156.cdn.cloudflare.comIn scope2026-11-14
magic-number-157.cdn.cloudflare.comIn scope2026-11-14
magic-number-158.cdn.cloudflare.comIn scope2026-11-14
magic-number-159.cdn.cloudflare.comIn scope2026-11-14
magic-number-16.cdn.cloudflare.comIn scope2026-11-14
magic-number-161.cdn.cloudflare.comIn scope2026-11-14
magic-number-162.cdn.cloudflare.comIn scope2026-11-14
magic-number-163.cdn.cloudflare.comIn scope2026-11-14
magic-number-164.cdn.cloudflare.comIn scope2026-11-14
magic-number-165.cdn.cloudflare.comIn scope2026-11-14
magic-number-169.cdn.cloudflare.comIn scope2026-11-14
magic-number-17.cdn.cloudflare.comIn scope2026-11-14
magic-number-170.cdn.cloudflare.comIn scope2026-11-14
magic-number-171.cdn.cloudflare.comIn scope2026-11-14
magic-number-174.cdn.cloudflare.comIn scope2026-11-14
magic-number-176.cdn.cloudflare.comIn scope2026-11-14
magic-number-177.cdn.cloudflare.comIn scope2026-11-14
magic-number-179.cdn.cloudflare.comIn scope2026-11-14
magic-number-18.cdn.cloudflare.comIn scope2026-11-14
magic-number-180.cdn.cloudflare.comIn scope2026-11-14
magic-number-181.cdn.cloudflare.comIn scope2026-11-14
magic-number-182.cdn.cloudflare.comIn scope2026-11-14
magic-number-183.cdn.cloudflare.comIn scope2026-11-14
magic-number-185.cdn.cloudflare.comIn scope2026-11-14
magic-number-186.cdn.cloudflare.comIn scope2026-11-14
magic-number-187.cdn.cloudflare.comIn scope2026-11-14
magic-number-188.cdn.cloudflare.comIn scope2026-11-14
magic-number-189.cdn.cloudflare.comIn scope2026-11-14
magic-number-19.cdn.cloudflare.comIn scope2026-11-14
magic-number-191.cdn.cloudflare.comIn scope2026-11-14
magic-number-192.cdn.cloudflare.comIn scope2026-11-14
magic-number-193.cdn.cloudflare.comIn scope2026-11-14
magic-number-195.cdn.cloudflare.comIn scope2026-11-14
magic-number-197.cdn.cloudflare.comIn scope2026-11-14
magic-number-198.cdn.cloudflare.comIn scope2026-11-14
magic-number-199.cdn.cloudflare.comIn scope2026-11-14
magic-number-20.cdn.cloudflare.comIn scope2026-11-14
magic-number-200.cdn.cloudflare.comIn scope2026-11-14
magic-number-201.cdn.cloudflare.comIn scope2026-11-14
magic-number-202.cdn.cloudflare.comIn scope2026-11-14
magic-number-203.cdn.cloudflare.comIn scope2026-11-14
magic-number-204.cdn.cloudflare.comIn scope2026-11-14
magic-number-206.cdn.cloudflare.comIn scope2026-11-14
magic-number-207.cdn.cloudflare.comIn scope2026-11-14
magic-number-208.cdn.cloudflare.comIn scope2026-11-14
magic-number-209.cdn.cloudflare.comIn scope2026-11-14
magic-number-21.cdn.cloudflare.comIn scope2026-11-14
magic-number-211.cdn.cloudflare.comIn scope2026-11-14
magic-number-212.cdn.cloudflare.comIn scope2026-11-14
magic-number-213.cdn.cloudflare.comIn scope2026-11-14
magic-number-214.cdn.cloudflare.comIn scope2026-11-14
magic-number-217.cdn.cloudflare.comIn scope2026-11-14
magic-number-218.cdn.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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