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Fencer Intel
high 7.5

CVE-2026-57819 json

Apache CXF: No default restriction on the amount of form parameters per message

published 3mo ago modified 18d ago also EUVD-2026-53852

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits
0
none known

Summary

Apache CXF allows to set a limit on the number of form parameters in a JAX-RS message via the "maxFormParameterCount" configuration option. However, no default limit is set which may lead to denial of service attacks when processing  requests with very large numbers of form parameters. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue by using a default limit of 500 parameters.

Patch / fix

  • Apache Software Foundation Apache CXF 3.6.12, 4.1.8, 4.2.3

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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-2026-57819 updated cvss 7.5

Apache CXF: Apache CXF: Denial of Service via uncontrolled form parameters

  • Red Hat build of Apache Camel 4 for Quarkus 3 cxf-core, cxf-xjc-dv, cxf-xjc-pl, cxf-xjc-ts, cxf-rt-wsdl, quarkus-cxf, +63 more Red Hat build of Apache Camel for Spring Boot 4 cxf, cxf-rt, cxf-bom, cxf-core, cxf-rt-rs, cxf-rt-ws, +202 more
    affected: workaround, no fix available “Update Apache CXF to the latest version that includes the fix. Configure form parameter limits in application settings to prevent resource exhaustion attacks.”
  • Red Hat Fuse 7 cxf-core, cxf-rest, cxf-soap, camel-cxf, cxf-utils, apache-cxf, +207 more
    affected: workaround, no fix planned “Update Apache CXF to the latest version that includes the fix. Configure form parameter limits in application settings to prevent resource exhaustion attacks.”
  • Red Hat Single Sign-On 7 cxf-core, cxf-xjc-dv, cxf-xjc-ts, cxf-rt-wsdl, cxf-rt-ws-rm, cxf-rt-ws-mex, +37 more
    affected: workaround, no fix available “Update Apache CXF to the latest version that includes the fix. Configure form parameter limits in application settings to prevent resource exhaustion attacks.”
  • Red Hat JBoss EAP 8.1 for RHEL 8 eap8-apache-cxf 4.1.8-1.redhat_00001.1.el8eap, eap8-apache-sshd 2.19.0-1.redhat_00001.1.el8eap, eap8-apache-cxf-rt 4.1.8-1.redhat_00001.1.el8eap, eap8-apache-cxf-tools 4.1.8-1.redhat_00001.1.el8eap, eap8-apache-cxf-services 4.1.8-1.redhat_00001.1.el8eap
    fixed: vendor fix “Update Apache CXF to the latest version that includes the fix. Configure form parameter limits in application settings to prevent resource exhaustion attacks.” RHSA-2026:92057
  • Red Hat JBoss EAP 8.1 for RHEL 9 eap8-apache-cxf 4.1.8-1.redhat_00001.1.el9eap, eap8-apache-cxf-rt 4.1.8-1.redhat_00001.1.el9eap, eap8-apache-cxf-tools 4.1.8-1.redhat_00001.1.el9eap, eap8-apache-cxf-services 4.1.8-1.redhat_00001.1.el9eap
    fixed: vendor fix “Update Apache CXF to the latest version that includes the fix. Configure form parameter limits in application settings to prevent resource exhaustion attacks.” RHSA-2026:92056
  • Red Hat JBoss EAP 8.1 for RHEL 10 eap8-apache-cxf 4.1.8-1.redhat_00001.1.el10eap, eap8-apache-cxf-rt 4.1.8-1.redhat_00001.1.el10eap, eap8-apache-cxf-tools 4.1.8-1.redhat_00001.1.el10eap, eap8-apache-cxf-services 4.1.8-1.redhat_00001.1.el10eap
    fixed: vendor fix “Update Apache CXF to the latest version that includes the fix. Configure form parameter limits in application settings to prevent resource exhaustion attacks.” RHSA-2026:92059
  • Red Hat JBoss Enterprise Application Platform 8.1
    fixed: vendor fix “Update Apache CXF to the latest version that includes the fix. Configure form parameter limits in application settings to prevent resource exhaustion attacks.” RHSA-2026:95887
  • Red Hat JBoss EAP 8.1 for RHEL 8 eap8-jaxb 4.0.8-2.redhat_00001.1.el8eap, eap8-txw2 4.0.8-2.redhat_00001.1.el8eap, eap8-xsom 4.0.8-2.redhat_00001.1.el8eap, eap8-rngom 4.0.8-2.redhat_00001.1.el8eap, eap8-log4j 2.25.5-1.redhat_00001.1.el8eap, eap8-jaxb-jxc 4.0.8-2.redhat_00001.1.el8eap, +86 more Red Hat JBoss EAP 8.1 for RHEL 9 eap8-jaxb 4.0.8-2.redhat_00001.1.el9eap, eap8-txw2 4.0.8-2.redhat_00001.1.el9eap, eap8-xsom 4.0.8-2.redhat_00001.1.el9eap, eap8-rngom 4.0.8-2.redhat_00001.1.el9eap, eap8-log4j 2.25.5-1.redhat_00001.1.el9eap, eap8-jaxb-jxc 4.0.8-2.redhat_00001.1.el9eap, +87 more Red Hat JBoss EAP 8.1 for RHEL 10 eap8-jaxb 4.0.8-2.redhat_00001.1.el10eap, eap8-txw2 4.0.8-2.redhat_00001.1.el10eap, eap8-xsom 4.0.8-2.redhat_00001.1.el10eap, eap8-rngom 4.0.8-2.redhat_00001.1.el10eap, eap8-log4j 2.25.5-1.redhat_00001.1.el10eap, eap8-jaxb-jxc 4.0.8-2.redhat_00001.1.el10eap, +86 more Red Hat JBoss Enterprise Application Platform 7 cxf, cxf-bom, cxf-core, xjc-utils, cxf-parent, cxf-xjc-dv, +49 more
    not affected: vulnerable code not present
show 1 more
  • Red Hat JBoss Enterprise Application Platform Expansion Pack cxf-core, cxf-xjc-dv, cxf-xjc-ts, cxf-rt-wsdl, cxf-rt-ws-rm, cxf-rt-ws-mex, +37 more Red Hat JBoss Web Server 5 cxf, cxf-rt, cxf-core, cxf-rt-rs, cxf-parent, cxf-rt-wsdl, +32 more
    not affected: component 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

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
3mo ago

Exploit prediction

0.73% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Apache Software Foundation Apache CXF

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Intel 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.