CVE-2019-3894: It was discovered that the ElytronManagedThread in Wildfly's Elytron subsystem in versions from 11 to 16 store

This month

HIGH 8.8WATCHLISTUPGRADEDOWNGRADE

CVE-2019-3894 is a high-severity flaw (CVSS 8.8) affecting wildfly, jboss enterprise application platform. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

It was discovered that the ElytronManagedThread in Wildfly's Elytron subsystem in versions from 11 to 16 stores a SecurityIdentity to run the thread as. These threads do not necessarily terminate if the keep alive time has not expired. This could allow a shared thread to use the wrong security identity when executing.

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-358
Published	2019-05-03
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: redhat

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

Am I affected?

Timeline

2019-05-03 20:29 UTCPublished CVE record published
2026-06-17 02:35 UTCUpdated Record last modified

redhat wildfly UPGRADE

Affected: >= 11.0.0 and <= 16.0.0

Fixed in: newer than 16.0.0

Safe to downgrade to: a release before 11.0.0

1. Check installed version

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

2. UPGRADE to newer than 16.0.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade wildfly

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 11.0.0 (Debian / Ubuntu)

apt-cache madison wildfly sudo apt install wildfly=<VERSION_BEFORE_11.0.0> sudo apt-mark hold wildfly

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

dnf --showduplicates list wildfly sudo dnf downgrade wildfly-<VERSION_BEFORE_11.0.0> sudo dnf versionlock add wildfly

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 enterprise application platform 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-enterprise-application-platform || rpm -q jboss-enterprise-application-platform || jboss-enterprise-application-platform --version

2. No fixed release: DOWNGRADE to a release before 7.0.0 (Debian / Ubuntu)

apt-cache madison jboss-enterprise-application-platform sudo apt install jboss-enterprise-application-platform=<VERSION_BEFORE_7.0.0> sudo apt-mark hold jboss-enterprise-application-platform

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

dnf --showduplicates list jboss-enterprise-application-platform sudo dnf downgrade jboss-enterprise-application-platform-<VERSION_BEFORE_7.0.0> sudo dnf versionlock add jboss-enterprise-application-platform

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-2019-3894?

wildfly: upgrade to newer than 16.0.0; jboss enterprise application platform: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-3894 being exploited?

CVE-2019-3894 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-2019-3894 affect?

CVE-2019-3894 affects wildfly, jboss enterprise application platform. Severity is high (CVSS 8.8). It was discovered that the ElytronManagedThread in Wildfly's Elytron subsystem in versions from 11 to 16 stores a SecurityIdentity to run the thread as. These threads do not necessarily terminate if the keep alive time has not expired. This

How urgent is CVE-2019-3894?

Priority 54/100. High severity; On your watchlist

Software pages

JBoss and WildFly vulnerabilities

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References

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