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Steady8 stories6 sourcesLast updated: 5/19/2026

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ZetaChain Exploit Loses $334K After Bug Bounty Report Dismissed as Intended Behavior
Developing
Tech·4/29/2026AI summary

ZetaChain Exploit Loses $334K After Bug Bounty Report Dismissed as Intended Behavior

ZetaChain lost approximately $334,000 in a premeditated exploit on Sunday that targeted its cross-chain gateway contract. The vulnerability had been previously flagged through the protocol's bug bounty program but was dismissed as intended behavior. The attacker exploited three design flaws in combination: unrestricted cross-chain instructions, broad execution permissions with a narrow blocklist, and lingering unlimited spending approvals from previous gateway users. No user funds were affected. A patch disabling arbitrary call functionality is being deployed.

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Cointelegraph
OpenAI Offers $25,000 Bounty for GPT-5.5 Jailbreak in Bio Bug Bounty Programme
Developing
Tech·4/24/2026AI summary

OpenAI Offers $25,000 Bounty for GPT-5.5 Jailbreak in Bio Bug Bounty Programme

OpenAI has launched a Bio Bug Bounty programme offering $25,000 to security researchers who can bypass GPT-5.5's biological safety guardrails. The programme, which opened applications on April 23, challenges participants to find a universal jailbreak prompt capable of getting the model to answer all five biosafety challenge questions without triggering moderation. Access is limited to Codex Desktop, and participants must be vetted and sign NDAs.

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Economic Times