This indicates an attack attempt to exploit a Security Bypass Vulnerability in MacOS Gatekeeper.
The vulnerability is due to an error in the vulnerable application when handling a maliciously crafted ZIP file. A remote attacker may be able to exploit this to bypass security measures and execute arbitrary code on the system via a crafted ZIP file.
On MacOS X version
Security Bypass: Remote attackers can bypass security mechanism on vulnerable systems
Currently we are unaware of any vendor supplied patch or update available for this issue.