CVE-2026-15564

Wildfly-ejb: wildfly-iiop-openjdk: eap iiop listeners may permit unauthed deserialization

Published Oct 29, 2026 CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed
Description
Wildfly's IIOP listener may permit deserialization of input streams before authentication is performed. An attacker who can gain access to the IIOP port may be able to construct and send malicious objects and achieve deserialization, if the target EJB allows untyped method parameters, and depending on the potential gadget chains available in the running classpath.

Remediation

Vendor Workaround

Restrict network reachability to the IIOP listener (default TCP port 3528) so that only localhost or authorized management networks can access it. 1. Restrict port exposure using firewalld: ```bash firewall-cmd --permanent --remove-port=3528/tcp firewall-cmd --reload ``` 2. If CORBA/IIOP interoperability is not required by deployed applications, remove the IIOP subsystem using the JBoss Management CLI: ```bash jboss-cli.sh --connect --command="/subsystem=iiop-openjdk:remove" ``` Caveats: Removing the IIOP subsystem will break remote EJB invocations or external services that rely on CORBA/IIOP protocols. Warning: Applying firewall changes or removing server subsystems will disrupt active client connections and requires reloading the server configuration or restarting the JBoss EAP service to take full effect.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:/a:redhat:jboss_enterprise_application_platform:8.1
References
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Wildfly's IIOP listener may permit deserialization of input streams before authentication is performed. An attacker who can gain access to the IIOP port may be able to construct and send malicious objects and achieve deserialization, if the target EJB allows untyped method parameters, and depending on the potential gadget chains available in the running classpath.
Title Wildfly-ejb: wildfly-iiop-openjdk: eap iiop listeners may permit unauthed deserialization
First Time appeared Redhat
Redhat jboss Enterprise Application Platform
Weaknesses CWE-829
CPEs cpe:/a:redhat:jboss_enterprise_application_platform:7
cpe:/a:redhat:jboss_enterprise_application_platform:8
Vendors & Products Redhat
Redhat jboss Enterprise Application Platform
References
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Nov 6, 2026, 5:27 PM
Reserved
Jul 13, 2026, 5:40 AM
Status
Awaiting Analysis
Published
Oct 29, 2026, 6:17 AM
Modified
Nov 6, 2026, 6:18 PM
Severity
Moderate
Public date
Oct 27, 2026, 12:00 AM