CVE-2026-15563 Red Hat CVE debrief

Who should care

Red Hat JBoss Enterprise Application Platform 7.4.25 administrators and users, as well as security teams responsible for monitoring and protecting EAP instances, should review and apply Red Hat errata. They should also verify IIOP listener configurations and monitor for suspicious activity to mitigate potential risks associated with this vulnerability. Security teams should prioritize patching and verifying configurations to prevent exploitation.

Why it matters

CVE-2026-15563 is a high-severity vulnerability in EAP's IIOP that allows an attacker to hijack JNDI lookups, potentially leading to MITM or DoS attacks. Red Hat JBoss Enterprise Application Platform 7.4.25 is affected. Administrators and security teams should review and apply Red Hat errata, verify IIOP listener configurations, and monitor for suspicious activity.

• Potential for Man-in-the-Middle (MITM) attacks on further invocations
• Potential for Denial of Service (DoS) on further invocations
• Need to verify IIOP listener configuration and authentication mechanisms
• Possible impact on JNDI lookup services and dependent applications

Technical summary

The IIOP listener in EAP accepts bind operations without authentication, allowing an attacker to hijack JNDI lookups and bind them to a malicious ORB, potentially achieving MITM or DoS on further invocations. This vulnerability affects Red Hat JBoss Enterprise Application Platform 7.4.25. The lack of authentication in IIOP operations enables attackers to manipulate JNDI lookups, leading to potential security breaches. Administrators should review and apply patches to mitigate these risks. The vulnerability has been detailed in official CVE and NVD records.

Defensive priority

High

Recommended defensive actions

• Review and apply Red Hat errata RHSA-2026:53644, RHSA-2026:53645, RHSA-2026:53646, RHSA-2026:53806, RHSA-2026:70228, RHSA-2026:70229, RHSA-2026:70230, and RHSA-2026:70277
• Verify the configuration of EAP's IIOP listener
• Monitor for suspicious JNDI lookup activity
• Consider implementing additional authentication for IIOP operations
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE and NVD provide official details on the vulnerability. Red Hat has released several errata related to this issue, including RHSA-2026:53644, RHSA-2026:53645, RHSA-2026:53646, and others. The vulnerability affects Red Hat JBoss Enterprise Application Platform 7.4.25. Evidence from official sources confirms the vulnerability's existence and provides guidance on mitigation.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.