CVE-2020-13757
Python-RSA before 4.1 ignores leading ‘ ’ bytes during decryption of ciphertext. This could conceivably have a security-relevant impact, e.g., by helping an attacker to infer that an application uses Python-RSA, or if the length of accepted ciphertext affects application behavior (such as by causing excessive memory allocation).
Date published : 2020-06-01
https://github.com/sybrenstuvel/python-rsa/issues/146#issuecomment-641845667