The ecdsa PyPI package, a pure Python implementation of ECC (Elliptic Curve Cryptography), is affected by a Minerva timing attack on the P-256 curve. This attack can leak the internal nonce when using the `ecdsa.SigningKey.sign digest()` API function, potentially allowing for private key discovery. The issue affects ECDSA signatures, key generation, and ECDH operations, but not ECDSA signature verification.