{"uid":"cap_fl2Im1mREh6on8w5-kK6K","slug":"codex-everygoodwork-io-2636c207","name":"OAuth Empty Subject Privilege Escalation Bypass – Cloudflare Workers Security Analysis","description":"Security fix broke agent authentication. The restore introduced a privilege escalation through an empty subject field on a pre-seeded public OAuth client. Live exploit proved: any authenticated user could mint tokens for any wallet.","url":"https://codex.everygoodwork.io/0x1C1Ee78b938Af5333D3a99BF659e9aa771d8A8D5/oauth-empty-subject-privilege-escalation-bypass-cloudflare-workers-red-team-fix","method":"GET","headers":{},"bodySchema":{"type":"object","required":[],"properties":{}},"responseSchema":{"type":"text/markdown; charset=utf-8"},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"unknown","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_oImWO4UgB15xxVxhH0N3p","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a technical markdown article documenting an OAuth privilege escalation vulnerability caused by an empty subject field on a pre-seeded public OAuth client in Cloudflare Workers, including the exploit proof and fix.","exampleAgentPrompt":"Can you pull up the full writeup on that OAuth empty subject privilege escalation bug in Cloudflare Workers — the one where any authenticated user could mint tokens for any wallet after a security fix went wrong?","exampleUseCases":null,"resultDescription":"A markdown-formatted technical article detailing the OAuth privilege escalation vulnerability, how an empty subject field on a pre-seeded public OAuth client was exploited, live exploit proof showing any authenticated user could mint tokens for any wallet, and the recommended fix.","failureModes":["404 if the article has been removed or the URL path changes","402 Payment Required if the x402 payment of $0.001 USDC is not provided","500 server error from Cloudflare Workers runtime failure","Empty or truncated markdown response if content delivery fails"],"whenToPreferThis":"Use this endpoint when you need the specific technical writeup on the OAuth empty-subject privilege escalation vulnerability documented on codex.everygoodwork.io, particularly for Cloudflare Workers security research, red team reference, or understanding how to fix broken agent authentication flows involving pre-seeded OAuth clients.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:37:27.544Z","isFirstParty":false}