CVE-2019-14859: Python-Ecdsa Project Python-Ecdsa

Critical severity, CVSS 9.1. EPSS: 1.5% chance of exploitation in the next 30 days.

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.

Affected products

• Python-Ecdsa Project Python-Ecdsa: before 0.13.3 (fixed in 0.13.3)
• Red Hat Ceph Storage: version 2.0 only; version 3.0 only
• Red Hat Openstack: version 10 only; version 13 only; version 14 only; version 15 only
• Red Hat Virtualization: version 4.0 only

Published 2020-01-02. Last modified 2026-06-17.