Guns and improvised explosive devices went through Dublin Airport security undetected last month.
It was part of a major security review by the European Aviation Safety Authority.
Seven 'prohibited' devices managed to bypass scanners and security staff during the EU audit last month, according to the Irish Mail on Sunday.
The guns, improvised explosive devices and components of explosive devices were put through screening in bags, and went undetected to airside.
The paper reports possible sanctions, involving additional security measures, could be imposed if it fails a follow-up assessment.
The European Aviation Safety Authority has contacted Dublin Airport Authority in recent days about a further audit.
In a statement, the airport operator says it doesn't comment on security matters.
It says it is regularly subject to independent, national and international oversight and is fully committed to safeguarding civil aviation.
