On November 5, 2026, OpenAI said its GPT-6 Cyber researchers had found 81 previously unknown Firefox vulnerabilities that Mozilla classified as high severity. OpenAI said it sent Mozilla evidence, reproducible tests and proposed patches for the findings in its announcement of GPT-6 Cyber.
Keep the two counts separate: 81 newly identified vulnerabilities and 30 previously known issues reassessed for severity.
The 30 known issues are a separate finding
OpenAI also reported that 30 previously known Firefox issues were more severe than earlier reports had indicated. They are a separate group from the 81 vulnerabilities described as previously unknown.
OpenAI reports that Mozilla has shipped many fixes
OpenAI said Mozilla began landing fixes shortly after receiving the reports and had released fixes for many of the findings. The announcement does not specify a total number of fixes. OpenAI also quoted Firefox Distinguished Engineer Brian Grinstead, who said the work helped the team ship fixes to users.
