President Mauricio Sulaiman revealed the news on Monday night, which has now placed the Australian’s career in tatters.
Browne was originally accused of using PED’s after his world title win over Ruslan Chagaev in July but successfully lobbied for a second shot at the championship after protesting his innocence.
The 37 year-old was due to fight Shannon Briggs next month in a bid to regain his position at the top, although Sulaiman has begun an investigation into the test.
“VADA has reported an adverse finding on Lucas Browne during a random out of competition test under the CBP, which Browne enrolled voluntarily,” Sulaiman told World Boxing News.
“There will be the process according to protocol. He has the right to open sample B and there will be a full investigation. Each case is different, and it is investigated separately.”
‘Big Daddy’ has apparently shown traces of ostarine in his sample, a drug used in muscle recovery and comes on the back of clenbuterol being found over the summer.
Promoter Ricky Hatton is yet to comment on the WBC’s announcement, whilst forthcoming opponent Briggs could be left in limbo should Browne be subsequently banned from competing.