IBM strongly recommends addressing the vulnerability now by applying a currently available interim fix or fix pack that contains the fix for APAR PH71453.

For IBM WebSphere Application Server traditional:

For V9.0.0.0 through 9.0.5.28:
· Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves PH71453
--OR--
· Apply Fix Pack 9.0.5.29 or later (targeted availability 3Q2026).

For V8.5.0.0 through 8.5.5.29:
· Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves PH71453
--OR--
· Apply Fix Pack 8.5.5.30 or later (targeted availability 3Q2026).

Additional interim fixes may be available and linked off the interim fix download page.

CVE-2026-9311

References