VULNERABILITY INTELLIGENCE

CVE-2019-14859

CVSS score9.1 CRITICAL
EPSS probability1.53%
CISA KEVNot currently listed
Published2020-01-02
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Description

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.

Weakness classification

  • CWE-347: Improper Verification of Cryptographic Signature

Primary references