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Fencer Vulns
high 7.5

CVE-2019-19343 json

A flaw was found in Undertow when using Remoting as shipped in Red Hat Jboss EAP before version 7.2.4.

published 2021-03-23 5 y ago modified 2026-06-17 4 mo ago also EUVD-2019-8964

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.6%
EPSS 1.6% chance of exploitation in 30 days, percentile 76%
public exploits
0
none known

Summary

A flaw was found in Undertow when using Remoting as shipped in Red Hat Jboss EAP before version 7.2.4. A memory leak in HttpOpenListener due to holding remote connections indefinitely may lead to denial of service. Versions before undertow 2.0.25.SP1 and jboss-remoting 5.0.14.SP1 are believed to be vulnerable.

Patch / fix

  • redhat jboss-remoting 5.0.14
  • redhat jboss_enterprise_application_platform 7.2.4
  • redhat undertow 2.0.25
  • undertow Debian 14 2.0.25-1

debian advisories DEBIAN-CVE-2019-19343

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-19343 updated cvss 5.9

Undertow: Memory Leak in Undertow HttpOpenListener due to holding remoting connections indefinitely

  • Red Hat JBoss Enterprise Application Platform 7 undertow undertow
    affected: no fix available
  • Red Hat JBoss Fuse 6 undertow undertow Red Hat OpenShift Application Runtimes undertow undertow
    affected: no fix planned “Out of support scope”
  • Red Hat Fuse 7.8.0
    fixed: vendor fix RHSA-2020:5568
  • Red Hat JBoss EAP 7.2
    fixed: vendor fix RHSA-2019:2938
  • Red Hat JBoss Enterprise Application Platform Continuous Delivery
    fixed: vendor fix RHSA-2020:2565
  • Red Hat Decision Manager 7 undertow undertow Red Hat JBoss Data Grid 7 undertow undertow Red Hat Process Automation 7 undertow undertow Red Hat Single Sign-On 7 undertow undertow
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.63% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • n/a Undertow

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
  • CWE-404 Improper Resource Shutdown or Release

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.