IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 are affected by an HTTP request smuggling vulnerability.
"}]}],"references":[{"url":"https://www.ibm.com/support/pages/node/7277550","tags":["vendor-advisory","patch"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE","baseSeverity":"HIGH","baseScore":7.4,"vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"}}],"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 PH71808 and PH71706. \n\n\n\nFor IBM WebSphere Application Server Liberty 17.0.0.3 - 26.0.0.6:\n\n\n\n· Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves PH71808 https://www.ibm.com/support/pages/node/7277460 \n--OR--\n· Apply Fix Pack 26.0.0.7 or later (targeted availability 3Q2026).\n\n\n\n\n\n\n\nFor IBM WebSphere Application Server traditional:\n\n\n\nFor V9.0.0.0 through 9.0.5.28:\n· Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves PH71706 https://www.ibm.com/support/pages/node/7277463 \n--OR--\n· Apply Fix Pack 9.0.5.29 or later (targeted availability 3Q2026). \n\n\n\nFor V8.5.0.0 through 8.5.5.30:\n· Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves PH71706 https://www.ibm.com/support/pages/node/7277463 \n--OR--\n· Apply Fix Pack 8.5.5.31 or later (targeted availability 3Q2026). \n\n\n\n\n\n\n\n\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 PH71808 and PH71706.
For IBM WebSphere Application Server Liberty 17.0.0.3 - 26.0.0.6:
· Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves PH71808
--OR--
· Apply Fix Pack 26.0.0.7 or later (targeted availability 3Q2026).
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 PH71706
--OR--
· Apply Fix Pack 9.0.5.29 or later (targeted availability 3Q2026).
For V8.5.0.0 through 8.5.5.30:
· Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves PH71706
--OR--
· Apply Fix Pack 8.5.5.31 or later (targeted availability 3Q2026).
Additional interim fixes may be available and linked off the interim fix download page.
"}]}],"x_generator":{"engine":"ibm-cvegen"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-01T14:52:04.153923Z","id":"CVE-2026-11541","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-01T14:52:15.909Z"}}]}}