1 | initial version |
Thank you for your observation, you should note that the Wireshark project does not supply winflexbison, that is an external resource provided by the winflexbison project over at https://sourceforge.net/projects/winflexbison.
As you didn't indicate which package you used, I downloaded the latest zip and submitted it, and the 2 executables in it, to VirusTotal which checks the files using 73 different AV engines and 2 engines reported issues with the executables, but 71 didn't, so as Jaap stated, this is likely to be a false positive.