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CVE-2020-1714: A flaw was found in Keycloak before version 11.0.0, where the code base contains usages of ObjectInputStream w

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This month
HIGH 8.8WATCHLISTUPGRADEDOWNGRADEDOWNGRADE

CVE-2020-1714 is a high-severity flaw (CVSS 8.8) affecting keycloak, decision manager, jboss fuse. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw was found in Keycloak before version 11.0.0, where the code base contains usages of ObjectInputStream without type checks. This flaw allows an attacker to inject arbitrarily serialized Java Objects, which would then get deserialized in a privileged context and potentially lead to remote code execution.

Why this priority

  • High severity
  • On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score8.8 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededLow
User interactionNone
EPSS exploit chance2.6% (top 15%)
CISA exploited listNo
WeaknessCWE-20
Published2020-05-13
Last modified2026-06-17
Publisher (CNA): Red Hat, Inc. · Vendor: redhat

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

Am I affected?

Timeline

redhat keycloak UPGRADE
Affected: < 11.0.0
Fixed in: 11.0.0
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy keycloak || rpm -q keycloak || keycloak --version
2. UPGRADE to 11.0.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade keycloak
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade keycloak
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
redhat decision manager DOWNGRADE
Affected: 7.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 7.0
1. Check installed version
apt-cache policy decision-manager || rpm -q decision-manager || decision-manager --version
2. No fixed release: DOWNGRADE to a release before 7.0 (Debian / Ubuntu)
apt-cache madison decision-manager sudo apt install decision-manager=<VERSION_BEFORE_7.0> sudo apt-mark hold decision-manager
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list decision-manager sudo dnf downgrade decision-manager-<VERSION_BEFORE_7.0> sudo dnf versionlock add decision-manager
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 jboss fuse DOWNGRADE
Affected: 7.0.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 7.0.0
1. Check installed version
apt-cache policy jboss-fuse || rpm -q jboss-fuse || jboss-fuse --version
2. No fixed release: DOWNGRADE to a release before 7.0.0 (Debian / Ubuntu)
apt-cache madison jboss-fuse sudo apt install jboss-fuse=<VERSION_BEFORE_7.0.0> sudo apt-mark hold jboss-fuse
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list jboss-fuse sudo dnf downgrade jboss-fuse-<VERSION_BEFORE_7.0.0> sudo dnf versionlock add jboss-fuse
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 openshift application runtimes MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy openshift-application-runtimes || rpm -q openshift-application-runtimes || openshift-application-runtimes --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
redhat process automation DOWNGRADE
Affected: 7.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 7.0
1. Check installed version
apt-cache policy process-automation || rpm -q process-automation || process-automation --version
2. No fixed release: DOWNGRADE to a release before 7.0 (Debian / Ubuntu)
apt-cache madison process-automation sudo apt install process-automation=<VERSION_BEFORE_7.0> sudo apt-mark hold process-automation
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list process-automation sudo dnf downgrade process-automation-<VERSION_BEFORE_7.0> sudo dnf versionlock add process-automation
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 single sign-on DOWNGRADE
Affected: 7.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 7.0
1. Check installed version
apt-cache policy single-sign-on || rpm -q single-sign-on || single-sign-on --version
2. No fixed release: DOWNGRADE to a release before 7.0 (Debian / Ubuntu)
apt-cache madison single-sign-on sudo apt install single-sign-on=<VERSION_BEFORE_7.0> sudo apt-mark hold single-sign-on
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list single-sign-on sudo dnf downgrade single-sign-on-<VERSION_BEFORE_7.0> sudo dnf versionlock add single-sign-on
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-2020-1714?

keycloak: upgrade to 11.0.0; decision manager: downgrade or apply the listed mitigation; jboss fuse: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-1714 being exploited?

CVE-2020-1714 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-2020-1714 affect?

CVE-2020-1714 affects keycloak, decision manager, jboss fuse. Severity is high (CVSS 8.8). A flaw was found in Keycloak before version 11.0.0, where the code base contains usages of ObjectInputStream without type checks. This flaw allows an attacker to inject arbitrarily serialized Java Objects, which would then get deserialized

How urgent is CVE-2020-1714?

Priority 57/100. High severity; On your watchlist

Software pages

Java vulnerabilities · Keycloak vulnerabilities · JBoss and WildFly vulnerabilities · Red Hat OpenShift vulnerabilities

Related CVEs

References

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