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CVE-2021-43572

CRITICAL CVSS: 9.8 Published: 2021-11-09 Modified: 2026-06-17

Description

The verify function in the Stark Bank Python ECDSA library (aka starkbank-escada or ecdsa-python) before 2.0.1 fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages.

Affected Platforms

Starkbank Ecdsa-Python

Weakness Type

CWE-347

References