EAP Elytron Token-Realm OAuth2 Introspection URL Encoding Flaw
CVE-2026-85511 Published on September 18, 2026
Wildfly-elytron-realm-token: parameter injection in eap's elytron oauth2
A flaw was found in EAP's Elytron. An EAP application whose security domain is backed by an Elytron token-realm with oauth2-introspection would allow parameter substitution due to missing URL encoding.
Vulnerability Analysis
CVE-2026-85511 can be exploited with network access, and requires small amount of user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.
Attack Vector:
NETWORK
Attack Complexity:
HIGH
Privileges Required:
LOW
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
LOW
Integrity Impact:
LOW
Availability Impact:
NONE
Timeline
Reported to Red Hat.
Made public. 112 days later.
Weakness Type
Authentication Bypass by Spoofing
This attack-focused weakness is caused by improperly implemented authentication schemes that are subject to spoofing attacks.
Products Associated with CVE-2026-85511
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Affected Versions
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10:- Version 0:2.40.0-8.redhat_00024.1.el10eap and below * is unaffected.
- Version 0:4.1.7-1.SP1_redhat_00001.1.el10eap and below * is unaffected.
- Version 0:2.0.5-1.Final_redhat_00001.1.el10eap and below * is unaffected.
- Version 0:1.85.0-1.redhat_00001.1.el10eap and below * is unaffected.
- Version 0:1.2.7-1.redhat_00002.1.el10eap and below * is unaffected.
- Version 0:801.8.0-1.GA_redhat_00001.1.el10eap and below * is unaffected.
- Version 0:6.6.54-1.Final_redhat_00001.1.el10eap and below * is unaffected.
- Version 0:4.1.5-5.redhat_00008.1.el10eap and below * is unaffected.
- Version 0:3.0.22-1.Final_redhat_00001.1.el10eap and below * is unaffected.
- Version 0:2.18.9-1.redhat_00003.1.el10eap and below * is unaffected.
- Version 0:2.18.9-1.redhat_00003.1.el10eap and below * is unaffected.
- Version 0:2.18.9-1.redhat_00003.1.el10eap and below * is unaffected.
- Version 0:2.18.9-1.redhat_00003.1.el10eap and below * is unaffected.
- Version 0:2.18.9-1.redhat_00003.1.el10eap and below * is unaffected.
- Version 0:2.18.9-1.redhat_00003.1.el10eap and below * is unaffected.
- Version 0:2.18.9-1.redhat_00003.1.el10eap and below * is unaffected.
- Version 0:4.0.5-1.redhat_00001.1.el10eap and below * is unaffected.
- Version 0:4.0.7-4.redhat_00001.1.el10eap and below * is unaffected.
- Version 0:2.1.0-1.redhat_00001.1.el10eap and below * is unaffected.
- Version 0:3.6.3-1.Final_redhat_00001.1.el10eap and below * is unaffected.
- Version 0:5.0.31-1.SP2_redhat_00001.1.el10eap and below * is unaffected.
- Version 0:3.1.0-1.Final_redhat_00001.1.el10eap and below * is unaffected.
- Version 0:2.2.0-1.Final_redhat_00001.1.el10eap and below * is unaffected.
- Version 0:7.4.0-1.Final_redhat_00001.1.el10eap and below * is unaffected.
- Version 0:3.0.1-1.Final_redhat_00001.1.el10eap and below * is unaffected.
- Version 0:5.1.0-1.Final_redhat_00001.1.el10eap and below * is unaffected.
- Version 0:4.0.11-2.SP1_redhat_00001.1.el10eap and below * is unaffected.
- Version 0:2.25.4-1.redhat_00003.1.el10eap and below * is unaffected.
- Version 0:3.2.2-1.redhat_00001.1.el10eap and below * is unaffected.
- Version 0:4.1.136-1.Final_redhat_00001.1.el10eap and below * is unaffected.
- Version 0:4.1.136-1.Final_redhat_00001.1.el10eap and below * is unaffected.
- Version 0:9.37.4-1.redhat_00001.1.el10eap and below * is unaffected.
- Version 0:1.1.9-1.redhat_00001.1.el10eap and below * is unaffected.
- Version 0:3.0.6-1.redhat_00001.1.el10eap and below * is unaffected.
- Version 0:2.0.18-1.redhat_00001.1.el10eap and below * is unaffected.
- Version 0:2.3.26-2.SP3_redhat_00001.1.el10eap and below * is unaffected.
- Version 0:8.1.8-9.GA_redhat_00006.1.el10eap and below * is unaffected.
- Version 0:2.6.11-1.Final_redhat_00001.1.el10eap and below * is unaffected.
- Version 0:8.1.1-12.GA_redhat_00048.1.el10eap and below * is unaffected.
- Version 0:2.3.2-1.redhat_00001.1.el10eap and below * is unaffected.
- Version 0:3.0.6-1.redhat_00001.1.el10eap and below * is unaffected.
- Version 0:2.40.0-8.redhat_00024.1.el8eap and below * is unaffected.
- Version 0:4.1.7-1.SP1_redhat_00001.1.el8eap and below * is unaffected.
- Version 0:2.0.5-1.Final_redhat_00001.1.el8eap and below * is unaffected.
- Version 0:1.85.0-1.redhat_00001.1.el8eap and below * is unaffected.
- Version 0:1.2.7-1.redhat_00002.1.el8eap and below * is unaffected.
- Version 0:801.8.0-1.GA_redhat_00001.1.el8eap and below * is unaffected.
- Version 0:6.6.54-1.Final_redhat_00001.1.el8eap and below * is unaffected.
- Version 0:4.1.5-5.redhat_00008.1.el8eap and below * is unaffected.
- Version 0:3.0.22-1.Final_redhat_00001.1.el8eap and below * is unaffected.
- Version 0:2.18.9-1.redhat_00003.1.el8eap and below * is unaffected.
- Version 0:2.18.9-1.redhat_00003.1.el8eap and below * is unaffected.
- Version 0:2.18.9-1.redhat_00003.1.el8eap and below * is unaffected.
- Version 0:2.18.9-1.redhat_00003.1.el8eap and below * is unaffected.
- Version 0:2.18.9-1.redhat_00003.1.el8eap and below * is unaffected.
- Version 0:2.18.9-1.redhat_00003.1.el8eap and below * is unaffected.
- Version 0:2.18.9-1.redhat_00003.1.el8eap and below * is unaffected.
- Version 0:4.0.5-1.redhat_00001.1.el8eap and below * is unaffected.
- Version 0:4.0.7-4.redhat_00001.1.el8eap and below * is unaffected.
- Version 0:2.1.0-1.redhat_00001.1.el8eap and below * is unaffected.
- Version 0:3.6.3-1.Final_redhat_00001.1.el8eap and below * is unaffected.
- Version 0:5.0.31-1.SP2_redhat_00001.1.el8eap and below * is unaffected.
- Version 0:3.1.0-1.Final_redhat_00001.1.el8eap and below * is unaffected.
- Version 0:2.2.0-1.Final_redhat_00001.1.el8eap and below * is unaffected.
- Version 0:7.4.0-1.Final_redhat_00001.1.el8eap and below * is unaffected.
- Version 0:3.0.1-1.Final_redhat_00001.1.el8eap and below * is unaffected.
- Version 0:5.1.0-1.Final_redhat_00001.1.el8eap and below * is unaffected.
- Version 0:4.0.11-2.SP1_redhat_00001.1.el8eap and below * is unaffected.
- Version 0:2.25.4-1.redhat_00003.1.el8eap and below * is unaffected.
- Version 0:3.2.2-1.redhat_00001.1.el8eap and below * is unaffected.
- Version 0:4.1.136-1.Final_redhat_00001.1.el8eap and below * is unaffected.
- Version 0:4.1.136-1.Final_redhat_00001.1.el8eap and below * is unaffected.
- Version 0:9.37.4-1.redhat_00001.1.el8eap and below * is unaffected.
- Version 0:1.1.9-1.redhat_00001.1.el8eap and below * is unaffected.
- Version 0:3.0.6-1.redhat_00001.1.el8eap and below * is unaffected.
- Version 0:2.0.18-1.redhat_00001.1.el8eap and below * is unaffected.
- Version 0:2.3.26-2.SP3_redhat_00001.1.el8eap and below * is unaffected.
- Version 0:8.1.8-9.GA_redhat_00006.1.el8eap and below * is unaffected.
- Version 0:2.6.11-1.Final_redhat_00001.1.el8eap and below * is unaffected.
- Version 0:8.1.1-12.GA_redhat_00048.1.el8eap and below * is unaffected.
- Version 0:2.3.2-1.redhat_00001.1.el8eap and below * is unaffected.
- Version 0:3.0.6-1.redhat_00001.1.el8eap and below * is unaffected.
- Version 0:2.40.0-8.redhat_00024.1.el9eap and below * is unaffected.
- Version 0:4.1.7-1.SP1_redhat_00001.1.el9eap and below * is unaffected.
- Version 0:2.0.5-1.Final_redhat_00001.1.el9eap and below * is unaffected.
- Version 0:1.85.0-1.redhat_00001.1.el9eap and below * is unaffected.
- Version 0:1.2.7-1.redhat_00002.1.el9eap and below * is unaffected.
- Version 0:801.8.0-1.GA_redhat_00001.1.el9eap and below * is unaffected.
- Version 0:6.6.54-1.Final_redhat_00001.1.el9eap and below * is unaffected.
- Version 0:4.1.5-5.redhat_00008.1.el9eap and below * is unaffected.
- Version 0:3.0.22-1.Final_redhat_00001.1.el9eap and below * is unaffected.
- Version 0:2.18.9-1.redhat_00003.1.el9eap and below * is unaffected.
- Version 0:2.18.9-1.redhat_00003.1.el9eap and below * is unaffected.
- Version 0:2.18.9-1.redhat_00003.1.el9eap and below * is unaffected.
- Version 0:2.18.9-1.redhat_00003.1.el9eap and below * is unaffected.
- Version 0:2.18.9-1.redhat_00003.1.el9eap and below * is unaffected.
- Version 0:2.18.9-1.redhat_00003.1.el9eap and below * is unaffected.
- Version 0:2.18.9-1.redhat_00003.1.el9eap and below * is unaffected.
- Version 0:4.0.5-1.redhat_00001.1.el9eap and below * is unaffected.
- Version 0:4.0.7-4.redhat_00001.1.el9eap and below * is unaffected.
- Version 0:2.1.0-1.redhat_00001.1.el9eap and below * is unaffected.
- Version 0:3.6.3-1.Final_redhat_00001.1.el9eap and below * is unaffected.
- Version 0:5.0.31-1.SP2_redhat_00001.1.el9eap and below * is unaffected.
- Version 0:3.1.0-1.Final_redhat_00001.1.el9eap and below * is unaffected.
- Version 0:2.2.0-1.Final_redhat_00001.1.el9eap and below * is unaffected.
- Version 0:7.4.0-1.Final_redhat_00001.1.el9eap and below * is unaffected.
- Version 0:3.0.1-1.Final_redhat_00001.1el9eap and below * is unaffected.
- Version 0:5.1.0-1.Final_redhat_00001.1.el9eap and below * is unaffected.
- Version 0:4.0.11-2.SP1_redhat_00001.1.el9eap and below * is unaffected.
- Version 0:2.25.4-1.redhat_00003.1.el9eap and below * is unaffected.
- Version 0:3.2.2-1.redhat_00001.1.el9eap and below * is unaffected.
- Version 0:4.1.136-1.Final_redhat_00001.1.el9eap and below * is unaffected.
- Version 0:4.1.136-1.Final_redhat_00001.1.el9eap and below * is unaffected.
- Version 0:9.37.4-1.redhat_00001.1.el9eap and below * is unaffected.
- Version 0:1.1.9-1.redhat_00001.1.el9eap and below * is unaffected.
- Version 0:3.0.6-1.redhat_00001.1.el9eap and below * is unaffected.
- Version 0:2.0.18-1.redhat_00001.1.el9eap and below * is unaffected.
- Version 0:2.3.26-2.SP3_redhat_00001.1.el9eap and below * is unaffected.
- Version 0:8.1.8-9.GA_redhat_00006.1.el9eap and below * is unaffected.
- Version 0:2.6.11-1.Final_redhat_00001.1.el9eap and below * is unaffected.
- Version 0:8.1.1-12.GA_redhat_00048.1.el9eap and below * is unaffected.
- Version 0:2.3.2-1.redhat_00001.1.el9eap and below * is unaffected.
- Version 0:3.0.6-1.redhat_00001.1.el9eap and below * is unaffected.