CVE-2019-14859

Name: CVE-2019-14859
Creator: NVD / NIST
Published: 2020-01-02T15:15:11.96+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 1.60%

Last modified Jun 17, 2026

CVE-2019-14859 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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. EPSS estimates a 1.60% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS Probability

1.60%

72.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Python-Ecdsa Project	Python-Ecdsa	< 0.13.3
Redhat	Ceph Storage	2.0
Redhat	Ceph Storage	3.0
Redhat	Openstack	10
Redhat	Openstack	13
Redhat	Openstack	14
Redhat	Openstack	15
Redhat	Virtualization	4.0

References

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14859Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/warner/python-ecdsa/issues/114Exploit, Third Party Advisory
https://github.com/warner/python-ecdsa/releases/tag/python-ecdsa-0.13.3Release Notes, Third Party Advisory
https://pypi.org/project/ecdsa/0.13.3/Release Notes, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14859Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/warner/python-ecdsa/issues/114Exploit, Third Party Advisory
https://github.com/warner/python-ecdsa/releases/tag/python-ecdsa-0.13.3Release Notes, Third Party Advisory
https://pypi.org/project/ecdsa/0.13.3/Release Notes, Third Party Advisory

Timeline

Published: Jan 2, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-14859?

How severe is CVE-2019-14859?

CVE-2019-14859 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 1.60% probability of exploitation in the next 30 days.

How do I fix CVE-2019-14859?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-14859?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST