Is there any evidence for lab release theory?

https://www.bbc.com/news/science-environment-52318539

 What kinds of security failures were the cables describing?

The short answer is we don't know from the information provided in the Washington Post. But, generally speaking, there are multiple ways that safety measures can be breached at labs dealing with biological agents.

According to Dr Lentzos, these include: "Who has access to the lab, the training and refresher-training of scientists and technicians, procedures for record-keeping, signage, inventory lists of pathogens, accident notification practices, emergency procedures."

Dr Lentzos said the issue of the virus' origin was a "very difficult question", and added that "there have been quiet, behind-the-scene discussions... in the biosecurity expert community, questioning the seafood market origin that has come out very strongly from China".

Amid this war of words between the countries, the painstaking - and largely unseen - scientific work to trace the origin of the virus will continue.