IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.4 IBM WebSphere Application Server Liberty is vulnerable to identity spoofing under limited conditions when an application is deployed without authentication and authorization configured.
"}]}],"references":[{"url":"https://www.ibm.com/support/pages/node/7270437","tags":["vendor-advisory","patch"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseSeverity":"HIGH","baseScore":7.5,"vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"}}],"solutions":[{"lang":"en","value":"IBM strongly recommends addressing the vulnerability now by applying a currently available interim fix or fix pack that contains the fix for APAR PH70352. IBM WebSphere Application Server Liberty is affected by identity spoofing only when the appSecurity feature (appSecurity-1.0, appSecurity-2.0, appSecurity-3.0, appSecurity-4.0, or appSecurity-5.0) is not enabled on the server. To determine if a feature is enabled for IBM WebSphere Application Server Liberty, refer to How to determine if Liberty is using a specific feature https://www.ibm.com/support/pages/node/6553910 . \n\nFor IBM WebSphere Application Server Liberty 17.0.0.3 - 26.0.0.4:\n· Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves PH70352 https://www.ibm.com/support/pages/node/7270436 \n--OR--\n· Apply Liberty Fix Pack 26.0.0.5 or later (targeted availability 2Q2026). \n\nAdditional interim fixes may be available and linked off the interim fix download page.","supportingMedia":[{"type":"text/html","base64":false,"value":"IBM strongly recommends addressing the vulnerability now by applying a currently available interim fix or fix pack that contains the fix for APAR PH70352. IBM WebSphere Application Server Liberty is affected by identity spoofing only when the appSecurity feature (appSecurity-1.0, appSecurity-2.0, appSecurity-3.0, appSecurity-4.0, or appSecurity-5.0) is not enabled on the server. To determine if a feature is enabled for IBM WebSphere Application Server Liberty, refer to How to determine if Liberty is using a specific feature.
For IBM WebSphere Application Server Liberty 17.0.0.3 - 26.0.0.4:
· Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves PH70352
--OR--
· Apply Liberty Fix Pack 26.0.0.5 or later (targeted availability 2Q2026).
Additional interim fixes may be available and linked off the interim fix download page.