CVE-2018-1000851: Copay Bitcoin Wallet version 5.01 to 5.1.0 included

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2018-1000851 is a critical-severity flaw (CVSS 9.8) affecting copay bitcoin wallet. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Copay Bitcoin Wallet version 5.01 to 5.1.0 included. contains a Other/Unknown vulnerability in wallet private key storage that can result in Users' private key can be compromised. . This attack appear to be exploitable via Affected version run the malicious code at startup . This vulnerability appears to have been fixed in 5.2.0 and later .

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.5% (top 15%)
CISA exploited list	No
Weakness	CWE-522
Published	2018-12-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: copay

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

Am I affected?

Timeline

2018-12-20 15:29 UTCPublished CVE record published
2026-06-17 01:33 UTCUpdated Record last modified

copay copay bitcoin wallet UPGRADE

Affected: >= 5.0.1 and <= 5.1.0

Fixed in: newer than 5.1.0

Safe to downgrade to: a release before 5.0.1

1. Check installed version

apt-cache policy copay-bitcoin-wallet || rpm -q copay-bitcoin-wallet || copay-bitcoin-wallet --version

2. UPGRADE to newer than 5.1.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade copay-bitcoin-wallet

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade copay-bitcoin-wallet

Note

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

3. If no update is available yet, DOWNGRADE to a release before 5.0.1 (Debian / Ubuntu)

apt-cache madison copay-bitcoin-wallet sudo apt install copay-bitcoin-wallet=<VERSION_BEFORE_5.0.1> sudo apt-mark hold copay-bitcoin-wallet

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list copay-bitcoin-wallet sudo dnf downgrade copay-bitcoin-wallet-<VERSION_BEFORE_5.0.1> sudo dnf versionlock add copay-bitcoin-wallet

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-2018-1000851?

copay bitcoin wallet: upgrade to newer than 5.1.0. Exact commands for each OS are on this page.

Is CVE-2018-1000851 being exploited?

CVE-2018-1000851 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-2018-1000851 affect?

CVE-2018-1000851 affects copay bitcoin wallet. Severity is critical (CVSS 9.8). Copay Bitcoin Wallet version 5.01 to 5.1.0 included. contains a Other/Unknown vulnerability in wallet private key storage that can result in Users' private key can be compromised. . This attack appear to be exploitable via Affected version

How urgent is CVE-2018-1000851?

Priority 65/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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