CVE-2021-43568: Starkbank Elixir Ecdsa

Critical severity, CVSS 9.8. EPSS: 1.1% chance of exploitation in the next 30 days.

The verify function in the Stark Bank Elixir ECDSA library (ecdsa-elixir) 1.0.0 fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages.

Affected products

• Starkbank Elixir Ecdsa: version 1.0.0 only

Published 2021-11-09. Last modified 2026-06-17.