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Fencer Vulns
medium 6.5

CVE-2020-10719 json

HTTP Request Smuggling in Undertow

published 2020-05-26 6 y ago modified 2026-06-17 4 mo ago also GHSA-cccf-7xw3-p2vr , EUVD-2021-0812

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 63%
public exploits
0
none known

Summary

A flaw was found in Undertow in versions before 2.1.1.Final, regarding the processing of invalid HTTP requests with large chunk sizes. This flaw allows an attacker to take advantage of HTTP request smuggling.

Patch / fix

  • maven io.undertow:undertow-core 2.1.1.Final
  • redhat undertow 2.1.1
  • netapp oncommand_insight 7.3.13
  • undertow Debian 14 2.1.1-1

debian advisories DEBIAN-CVE-2020-10719

  • eap7-txw2 jboss enterprise application platform 7.3 2.3.3-4.b02_redhat_00001.1.el7eap
  • eap7-xsom jboss enterprise application platform 7.3 2.3.3-4.b02_redhat_00001.1.el7eap
  • eap7-rngom jboss enterprise application platform 7.3 2.3.3-4.b02_redhat_00001.1.el7eap
  • eap7-wss4j jboss enterprise application platform 7.3, jboss enterprise application platform 7.2 2.2.5-1.redhat_00001.1.el7eap
  • eap7-jandex jboss enterprise application platform 7.3 2.1.2-1.Final_redhat_00001.1.el7eap
  • eap7-jasypt jboss enterprise application platform 7.3, jboss enterprise application platform 7.2 1.9.3-1.redhat_00001.1.el7eap
  • eap7-wildfly jboss enterprise application platform 7.3 7.3.1-5.GA_redhat_00003.1.el7eap
  • eap7-jaxb-jxc jboss enterprise application platform 7.3 2.3.3-4.b02_redhat_00001.1.el7eap

red hat advisories RHSA-2020:2512RHSA-2020:2511RHSA-2020:2513RHSA-2020:2060RHSA-2020:2059RHSA-2020:2058

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-2020-10719 updated cvss 6.5

undertow: invalid HTTP request with large chunk size

  • Red Hat JBoss Data Grid 7 undertow undertow
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift Application Runtimes undertow undertow
    affected: no fix available
  • Red Hat EAP-CD 20 Tech Preview
    fixed: vendor fix RHSA-2020:3585
  • Red Hat Fuse 7.9
    fixed: vendor fix RHSA-2021:3140
  • Red Hat JBoss EAP 7.2
    fixed: vendor fix RHSA-2020:2061
  • Red Hat JBoss EAP 7.2 for RHEL 6 Server eap7-wss4j 2.2.5-1.redhat_00001.1.el6eap, eap7-jasypt 1.9.3-1.redhat_00001.1.el6eap, eap7-opensaml 3.3.1-1.redhat_00002.1.el6eap, eap7-wildfly 7.2.8-3.GA_redhat_00002.1.el6eap, eap7-apache-cxf 3.2.12-1.redhat_00001.1.el6eap, eap7-cryptacular 1.2.4-1.redhat_00001.1.el6eap, +152 more
    fixed: vendor fix RHSA-2020:2058
  • Red Hat JBoss EAP 7.2 for RHEL 7 Server eap7-wss4j 2.2.5-1.redhat_00001.1.el7eap, eap7-jasypt 1.9.3-1.redhat_00001.1.el7eap, eap7-opensaml 3.3.1-1.redhat_00002.1.el7eap, eap7-wildfly 7.2.8-3.GA_redhat_00002.1.el7eap, eap7-apache-cxf 3.2.12-1.redhat_00001.1.el7eap, eap7-cryptacular 1.2.4-1.redhat_00001.1.el7eap, +154 more
    fixed: vendor fix RHSA-2020:2059
  • Red Hat JBoss EAP 7.2 for RHEL 8 eap7-wss4j 2.2.5-1.redhat_00001.1.el8eap, eap7-jasypt 1.9.3-1.redhat_00001.1.el8eap, eap7-opensaml 3.3.1-1.redhat_00002.1.el8eap, eap7-wildfly 7.2.8-3.GA_redhat_00002.1.el8eap, eap7-apache-cxf 3.2.12-1.redhat_00001.1.el8eap, eap7-cryptacular 1.2.4-1.redhat_00001.1.el8eap, +152 more
    fixed: vendor fix RHSA-2020:2060
show 7 more
  • Red Hat JBoss EAP 7.3 for BaseOS-8 eap7-wss4j 2.2.5-1.redhat_00001.1.el8eap, eap7-jasypt 1.9.3-1.redhat_00001.1.el8eap, eap7-opensaml 3.3.1-1.redhat_00002.1.el8eap, eap7-txw2 2.3.3-4.b02_redhat_00001.1.el8eap, eap7-xsom 2.3.3-4.b02_redhat_00001.1.el8eap, eap7-rngom 2.3.3-4.b02_redhat_00001.1.el8eap, +194 more
    fixed: vendor fix RHSA-2020:2513
  • Red Hat JBoss EAP 7.3 for RHEL 6 Server eap7-wss4j 2.2.5-1.redhat_00001.1.el6eap, eap7-jasypt 1.9.3-1.redhat_00001.1.el6eap, eap7-opensaml 3.3.1-1.redhat_00002.1.el6eap, eap7-txw2 2.3.3-4.b02_redhat_00001.1.el6eap, eap7-xsom 2.3.3-4.b02_redhat_00001.1.el6eap, eap7-rngom 2.3.3-4.b02_redhat_00001.1.el6eap, +194 more
    fixed: vendor fix RHSA-2020:2511
  • Red Hat JBoss EAP 7.3 for RHEL 7 Server eap7-wss4j 2.2.5-1.redhat_00001.1.el7eap, eap7-jasypt 1.9.3-1.redhat_00001.1.el7eap, eap7-opensaml 3.3.1-1.redhat_00002.1.el7eap, eap7-txw2 2.3.3-4.b02_redhat_00001.1.el7eap, eap7-xsom 2.3.3-4.b02_redhat_00001.1.el7eap, eap7-rngom 2.3.3-4.b02_redhat_00001.1.el7eap, +196 more
    fixed: vendor fix RHSA-2020:2512
  • Red Hat JBoss Enterprise Application Platform 7
    fixed: vendor fix RHSA-2020:2515
  • Red Hat Single Sign-On 7.4.1
    fixed: vendor fix RHSA-2020:2813
  • Red Hat Text-Only RHOAR
    fixed: vendor fix RHSA-2020:2905
  • Red Hat A-MQ Clients 2 undertow undertow Red Hat Data Grid 8 undertow undertow Red Hat Decision Manager 7 undertow undertow Red Hat Process Automation 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

1.00% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
NVD 2.0 6.4 AV:N/AC:L/Au:N/C:P/I:P/A:N
GitHub 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
maven io.undertow:undertow-core
<2.1.1.Final
2.1.1.Final

Affected products

  • Red Hat undertow

Classification

Weakness
  • CWE-444 Inconsistent Interpretation of HTTP Requests

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.