CVE-2026-85634 Red Hat CVE debrief

Who should care

Defenders managing WildFly and JBoss EAP deployments, especially those using the Deployer RBAC role, should assess exposure and prioritize remediation. This includes reviewing affected versions, restricting access to deployment management interfaces, and monitoring for suspicious deployment name activity. The potential impact includes privilege escalation to the management SuperUser role and possible deletion of arbitrary directories or creation of files с

Why it matters

CVE-2026-85634 allows an attacker with the Deployer RBAC role to escalate privileges via path traversal in deployment names, impacting WildFly and JBoss EAP deployments.

• Potential privilege escalation to the management SuperUser role.
• Possible deletion of arbitrary directories or creation of files with arbitrary content.
• Required verification of affected versions and remediation from official sources.
• Necessity to restrict access to deployment management interfaces.

Technical summary

The ContentRepositoryImpl.copyExplodedContent function in wildfly-core does not properly contain deployment names, allowing an attacker with the Deployer RBAC role to use path traversal sequences to access files outside the deployment directory. This can lead to a full privilege escalation to the management SuperUser role, as the attacker can delete arbitrary directories or create files with arbitrary content. Defenders should prioritize verifying exposure in WildFly and JBoss EAP deployments, especially where the Deployer RBAC role is used.

Defensive priority

Defenders should prioritize verifying exposure in WildFly and JBoss EAP deployments, especially where the Deployer RBAC role is used.

Recommended defensive actions

• Verify exposure in WildFly and JBoss EAP deployments using the Deployer RBAC role.
• Restrict access to deployment management interfaces.
• Monitor for suspicious deployment name activity.
• Apply vendor remediation when available.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The issue occurs in the ContentRepositoryImpl.copyExplodedContent function of the wildfly-core library. An attacker can use path traversal sequences to access files outside the restricted deployment directory, allowing them to delete arbitrary directories or create files with arbitrary content.

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.