There is 1 open security issue in buster.
1 issue left for the package maintainer to handle:
In Legion of the Bouncy Castle BC before 1.61 and BC-FJA before 184.108.40.206, attackers can obtain sensitive information about a private exponent because of Observable Differences in Behavior to Error Inputs. This occurs in org.bouncycastle.crypto.encodings.OAEPEncoding. Sending invalid ciphertext that decrypts to a short payload in the OAEP Decoder could result in the throwing of an early exception, potentially leaking some information about the private exponent of the RSA private key performing the encryption.
You can find information about how to handle this issue in the security team's documentation.