CVE-2022-0839: Improper Restriction of XML External Entity Reference in GitHub repository liquibase/liquibase prior to 4.8.0.

This week

CRITICAL 9.8REMOTEUPGRADEDOWNGRADE

CVE-2022-0839 is a critical-severity flaw (CVSS 9.8) affecting liquibase, sqlcl. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper Restriction of XML External Entity Reference in GitHub repository liquibase/liquibase prior to 4.8.0.

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	3.0% (top 13%)
CISA exploited list	No
Weakness	CWE-611
Published	2022-03-04
Last modified	2026-06-17

Publisher (CNA): huntr.dev · Vendor: liquibase · oracle

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

Am I affected?

Timeline

2022-03-04 15:15 UTCPublished CVE record published
2026-06-17 04:21 UTCUpdated Record last modified

liquibase liquibase UPGRADE

Affected: < 4.8.0

Fixed in: 4.8.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 4.8.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade liquibase

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade liquibase

Note

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

oracle sqlcl DOWNGRADE

Affected: 19c

Fixed in: no fixed release known

Safe to downgrade to: a release before 19c

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 19c (Debian / Ubuntu)

apt-cache madison sqlcl sudo apt install sqlcl=<VERSION_BEFORE_19c> sudo apt-mark hold sqlcl

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

dnf --showduplicates list sqlcl sudo dnf downgrade sqlcl-<VERSION_BEFORE_19c> sudo dnf versionlock add sqlcl

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-2022-0839?

liquibase: upgrade to 4.8.0; sqlcl: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-0839 being exploited?

CVE-2022-0839 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-2022-0839 affect?

CVE-2022-0839 affects liquibase, sqlcl. Severity is critical (CVSS 9.8). Improper Restriction of XML External Entity Reference in GitHub repository liquibase/liquibase prior to 4.8.0.

How urgent is CVE-2022-0839?

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

Software pages

GitHub vulnerabilities

References

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