CVE-2019-14859: A flaw was found in all python-ecdsa versions before 0.13.3, where it did not correctly verify whether signatu

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CRITICAL 9.1REMOTEWATCHLISTUPGRADEDOWNGRADEDOWNGRADE

CVE-2019-14859 is a critical-severity flaw (CVSS 9.1) affecting python-ecdsa, ceph storage, openstack. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.5% (top 25%)
CISA exploited list	No
Weakness	CWE-347
Published	2020-01-02
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: python-ecdsa project · redhat

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-01-02 15:15 UTCPublished CVE record published
2026-06-17 02:19 UTCUpdated Record last modified

python-ecdsa project python-ecdsa UPGRADE

Affected: < 0.13.3

Fixed in: 0.13.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy python-ecdsa || rpm -q python-ecdsa || python-ecdsa --version

2. UPGRADE to 0.13.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade python-ecdsa

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade python-ecdsa

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

redhat ceph storage DOWNGRADE

Affected: 2.0 · 3.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0

1. Check installed version

apt-cache policy ceph-storage || rpm -q ceph-storage || ceph-storage --version

2. No fixed release: DOWNGRADE to a release before 2.0 (Debian / Ubuntu)

apt-cache madison ceph-storage sudo apt install ceph-storage=<VERSION_BEFORE_2.0> sudo apt-mark hold ceph-storage

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ceph-storage sudo dnf downgrade ceph-storage-<VERSION_BEFORE_2.0> sudo dnf versionlock add ceph-storage

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

redhat openstack DOWNGRADE

Affected: 10 · 13 · 14 · 15

Fixed in: no fixed release known

Safe to downgrade to: a release before 10

1. Check installed version

apt-cache policy openstack || rpm -q openstack || openstack --version

2. No fixed release: DOWNGRADE to a release before 10 (Debian / Ubuntu)

apt-cache madison openstack sudo apt install openstack=<VERSION_BEFORE_10> sudo apt-mark hold openstack

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list openstack sudo dnf downgrade openstack-<VERSION_BEFORE_10> sudo dnf versionlock add openstack

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

redhat virtualization DOWNGRADE

Affected: 4.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0

1. Check installed version

apt-cache policy virtualization || rpm -q virtualization || virtualization --version

2. No fixed release: DOWNGRADE to a release before 4.0 (Debian / Ubuntu)

apt-cache madison virtualization sudo apt install virtualization=<VERSION_BEFORE_4.0> sudo apt-mark hold virtualization

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list virtualization sudo dnf downgrade virtualization-<VERSION_BEFORE_4.0> sudo dnf versionlock add virtualization

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-14859?

python-ecdsa: upgrade to 0.13.3; ceph storage: downgrade or apply the listed mitigation; openstack: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-14859 being exploited?

CVE-2019-14859 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-14859 affect?

CVE-2019-14859 affects python-ecdsa, ceph storage, openstack. Severity is critical (CVSS 9.1). 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

How urgent is CVE-2019-14859?

Priority 66/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Python vulnerabilities · OpenStack vulnerabilities · Ceph vulnerabilities

Related CVEs

CVE-2019-14853 HIGH 7.5 UPGRADE An error-handling flaw was found in python-ecdsa before version 0.13.3

References

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