CVE-2019-14859
CVSS v3
9.1
CRITICAL
EPSS Score
1.5 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2020-01-02
Frequently asked questions
What is CVE-2019-14859?
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.
Is CVE-2019-14859 actively exploited?
Active exploitation of CVE-2019-14859 has not been confirmed. Its EPSS score was 1.5% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2019-14859?
CVE-2019-14859 has a CVSS v3 base score of 9.1 (CRITICAL severity).
Is CVE-2019-14859 affecting your environment?
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