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Fencer Vulns
critical 9.1

CVE-2026-65583 json

Apache CXF: Self-issued ID token claims validation skipped

published 2026-08-06 3 mo ago modified 2026-10-24 15 d ago also EUVD-2026-53859

cvss
9.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits
0
none known

Summary

Apache CXF’s OIDC relying-party token validation could accept self-issued ID tokens without enforcing required claim checks (issuer/subject/audience/time and sub_jwk binding), enabling authentication bypass with crafted tokens. However, note that self-issued ID tokens are not accepted by default in the validator. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fixes this issue.

Patch / fix

  • Apache Software Foundation Apache CXF 3.6.12, 4.1.8, 4.2.3

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-2026-65583 updated cvss 7.4

org.apache.cxf/cxf: Apache CXF: Authentication Bypass via Crafted OIDC Self-Issued ID Tokens

  • Red Hat build of Apache Camel for Spring Boot 4 cxf 4.1.7.rhbac-redhat-00006
    affected: workaround, no fix available
  • Red Hat JBoss Enterprise Application Platform 7 cxf 4.1.7.rhbac-redhat-00006
    affected: workaround, no fix planned “Will not fix”
  • Red Hat JBoss Enterprise Application Platform Expansion Pack cxf 4.1.7.rhbac-redhat-00006 Red Hat JBoss Web Server 5 cxf 4.1.7.rhbac-redhat-00006
    affected: workaround, no fix available
  • Red Hat JBoss EAP 8.1 for RHEL 8 eap8-apache-cxf 4.1.8-1.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 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 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 RHSA-2026:92059
  • Red Hat JBoss Enterprise Application Platform 8.1
    fixed: vendor fix 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, +87 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
    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

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
3 mo ago

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CNA 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

  • Apache Software Foundation Apache CXF

Classification

Weakness
  • CWE-345 Insufficient Verification of Data Authenticity

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.