Your Lightning network node contains many secrets that are important to protect. One of them are your revocation keys.
One fundamental vulnerability of the Lightning Network is the possibility of losing or leaking the secret revocation keys. If a malicious actor gains access to the revocation key, they can use it to steal all the funds in the payment channel, making this a highly sensitive secret. Similarly, if a revocation key is lost, it can result in the loss of funds that could have been recovered in case of a revoked transaction.