// OpenaiMEDIUM
Security researchers at Pwn2Own Ireland 2026 demonstrated a zero-day argument injection vulnerability in OpenAI Codex during the first day of the contest in Cork on October 2026. The vulnerability was part of a multi-bug exploit chain and earned participants $368,000+ in prizes. Vendors, including OpenAI, receive 90 days to develop patches before public disclosure under ZDI program rules.
- Daily Cybersecurity News – October 7, 2026 | Cyber Recaps(opens in a new tab)
- Pwn2Own 2026: AI Infrastructure Falls, LiteLLM Hit Twice | bytei(opens in a new tab)
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