CVE-2026-101294 IBM CVE debrief

Who should care

WebSphere Application Server and WebSphere Application Server Liberty administrators and users, as well as security teams and vulnerability management teams responsible for ensuring the security of affected systems. These individuals should verify and apply patches, review and update cryptographic signature verification processes, and monitor for potential exploitation attempts to prevent potential security incidents.

Why it matters

This vulnerability allows a remote attacker to bypass cryptographic signature verification, potentially leading to security incidents. WebSphere Application Server and WebSphere Application Server Liberty administrators and users should verify and apply patches, review and update cryptographic signature verification processes, and monitor for potential exploitation attempts.

• Verify and apply patches to prevent potential exploitation
• Review and update cryptographic signature verification processes to ensure secure communication
• Monitor for potential exploitation attempts to detect potential security incidents

Technical summary

IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.10 and IBM WebSphere Application Server 8.5, and 9.0 could allow a remote attacker to bypass cryptographic signature verification due to improper verification of cryptographic signature. This vulnerability is caused by a missing cryptographic step, which could enable attackers to compromise the security of affected systems. Administrators and users should take immediate action to verify and apply patches, review and update cryptographic signature verification processes, and monitor for potential exploitation attempts.

Defensive priority

High priority for WebSphere Application Server and WebSphere Application Server Liberty administrators to verify and apply patches.

Recommended defensive actions

• Verify and apply patches for WebSphere Application Server and WebSphere Application Server Liberty
• Review and update cryptographic signature verification processes
• Monitor for potential exploitation attempts
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• 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 record and source item provide details on the vulnerability, but limited information is available on exploitation or impact. Defenders should verify the affected scope, review official advisories, and monitor for potential exploitation attempts. The vulnerability is caused by improper verification of cryptographic signatures, which could allow a remote attacker to bypass security measures.

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.