Python-Ecdsa Project Python-Ecdsa vulnerabilities

CVE-2019-14859 [CRITICAL] CWE-347 CVE-2019-14859: A flaw was found in all python-ecdsa versions before 0.13.3, where it did not correctly verify wheth A flaw was found in all python-ecdsa versions before 0.13.3, where it did not correctly verify whether signatures used DER encoding. Without this verification, a malformed signature could be accepted, making the signature malleable. Without proper verification, an attacker could use a malleable signature to create false transactions.

CVE-2019-14853 [HIGH] CWE-391 CVE-2019-14853: An error-handling flaw was found in python-ecdsa before version 0.13.3. During signature decoding, m An error-handling flaw was found in python-ecdsa before version 0.13.3. During signature decoding, malformed DER signatures could raise unexpected exceptions (or no exceptions at all), which could lead to a denial of service.

CVE-2026-33936 [MEDIUM] CVE-2026-33936: The `ecdsa` PyPI package is a pure Python implementation of ECC (Elliptic Curve Cryptography) with support for ECDSA (Elliptic Curve Digital Signature The `ecdsa` PyPI package is a pure Python implementation of ECC (Elliptic Curve Cryptography) with support for ECDSA (Elliptic Curve Digital Signature Algorithm), EdDSA (Edwards-curve Digital Signature Algorithm) and ECDH (Elliptic Curve Diffie-Hellman). Prior to version 0.19.2, an issue in the low-level DER