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security: harden CORS origin validation on faucet and index-supply #694

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security: harden CORS origin validation on faucet and index-supply #694

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7817e8e
security: harden CORS origin validation on faucet and index-supply
MoneyBund Jul 15, 2026
7ddc1b7
security: harden CORS origin validation on faucet and index-supply
MoneyBund Jul 15, 2026
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16 changes: 12 additions & 4 deletions src/pages/_api/api/faucet.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -53,18 +53,26 @@ async function fund(address: `0x${string}`, headers: Record<string, string>): Pr
}
}

function cors(origin: string | null): Record<string, string> {
function isAllowedOrigin(origin: string): boolean {
const allowedOrigins = ['https://tempo.xyz', 'https://docs.tempo.xyz']

if (origin?.includes('vercel.app')) allowedOrigins.push(origin)
if (process.env.NODE_ENV === 'development') allowedOrigins.push('http://localhost:5173')
if (allowedOrigins.includes(origin)) return true

try {
const { protocol, hostname } = new URL(origin)
return protocol === 'https:' && hostname.endsWith('.vercel.app')
} catch {
return false
}
}

function cors(origin: string | null): Record<string, string> {
const headers: Record<string, string> = {
'Access-Control-Allow-Methods': 'POST, OPTIONS',
'Access-Control-Allow-Headers': 'Content-Type, x-api-token',
}

if (origin && allowedOrigins.includes(origin)) headers['Access-Control-Allow-Origin'] = origin
if (origin && isAllowedOrigin(origin)) headers['Access-Control-Allow-Origin'] = origin

return headers
}
17 changes: 12 additions & 5 deletions src/pages/_api/api/index-supply.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -119,19 +119,26 @@ export async function OPTIONS(request: Request): Promise<Response> {
return new Response(null, { status: 200, headers: cors(origin) })
}

function cors(origin: string | null): Record<string, string> {
function isAllowedOrigin(origin: string): boolean {
const allowedOrigins = ['https://tempo.xyz', 'https://mainnet.docs.tempo.xyz']

if (origin?.includes('vercel.app')) allowedOrigins.push(origin)
if (process.env.NODE_ENV === 'development') allowedOrigins.push('http://localhost:5173')
if (allowedOrigins.includes(origin)) return true

try {
const { protocol, hostname } = new URL(origin)
return protocol === 'https:' && hostname.endsWith('.vercel.app')
} catch {
return false
}
}

function cors(origin: string | null): Record<string, string> {
const headers: Record<string, string> = {
'Access-Control-Allow-Methods': 'POST, OPTIONS',
'Access-Control-Allow-Headers': 'Content-Type, x-api-token',
}

if (origin && allowedOrigins.some((allowed) => origin.startsWith(allowed)))
headers['Access-Control-Allow-Origin'] = origin
if (origin && isAllowedOrigin(origin)) headers['Access-Control-Allow-Origin'] = origin

return headers
}