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 vulnerable to HTTP request smuggling. A remote attacker could smuggle a specially crafted request to the application server thereby allowing the attacker to bypass security controls, spoof identity, escalate privilege, and expose sensitive information.
"}],"value":"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 vulnerable to HTTP request smuggling. A remote attacker could smuggle a specially crafted request to the application server thereby allowing the attacker to bypass security controls, spoof identity, escalate privilege, and expose sensitive information."}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.4,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-444","description":"CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-06-22T14:44:42.460Z","orgId":"9a959283-ebb5-44b6-b705-dcc2bbced522","shortName":"ibm"},"references":[{"tags":["vendor-advisory","patch"],"url":"https://www.ibm.com/support/pages/node/7276579"}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"IBM strongly recommends addressing the vulnerability now by applying a currently available interim fix or fix pack that contains the fix for APAR PH71631 and PH71370. To determine if a feature is enabled for 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 - 26.0.0.6 using the servlet-3.0, servlet-3.1, servlet-4.0, servlet-5.0, servlet-6.0, servlet-6.1, websocket-1.0, websocket-1.1, websocket-2.0, websocket-2.1, or websocket-2.2 feature:
· Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves PH71631
--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 PH71370
--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 interim fix and then apply Interim Fix that resolves PH71370
--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.
"}],"value":"IBM strongly recommends addressing the vulnerability now by applying a currently available interim fix or fix pack that contains the fix for APAR PH71631 and PH71370. To determine if a feature is enabled for 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\n\n\nFor IBM WebSphere Application Server Liberty 17.0.0.3 - 26.0.0.6 using the servlet-3.0, servlet-3.1, servlet-4.0, servlet-5.0, servlet-6.0, servlet-6.1, websocket-1.0, websocket-1.1, websocket-2.0, websocket-2.1, or websocket-2.2 feature:\n\n\n\n· Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves PH71631 https://www.ibm.com/support/pages/node/7276381 \n--OR--\n· Apply Fix Pack 26.0.0.7 or later (targeted availability 3Q2026).\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 PH71370 https://www.ibm.com/support/pages/node/7276399 \n--OR--\n· Apply Fix Pack 9.0.5.29 or later (targeted availability 3Q2026). \n\n\n\nFor V8.5.0.0 through 8.5.5.29:\n· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix that resolves PH71370 https://www.ibm.com/support/pages/node/7276399 \n--OR--\n· Apply Fix Pack 8.5.5.30 or later (targeted availability 3Q2026).\n\n\n\n\n\n\n\nAdditional interim fixes may be available and linked off the interim fix download page."}],"title":"IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by multiple vulnerabilities","x_generator":{"engine":"ibm-cvegen"}}},"cveMetadata":{"assignerOrgId":"9a959283-ebb5-44b6-b705-dcc2bbced522","assignerShortName":"ibm","cveId":"CVE-2026-8646","datePublished":"2026-06-22T14:44:42.460Z","dateReserved":"2026-05-14T20:38:35.335Z","dateUpdated":"2026-06-22T15:58:37.275Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-22 16:16:42","lastModifiedDate":"2026-06-22 18:16:51","problem_types":["CWE-444","CWE-444 CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')"],"metrics":{"cvssMetricV31":[{"source":"psirt@us.ibm.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","baseScore":7.4,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":2.2,"impactScore":5.2}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-06-22T15:58:27.037369Z","id":"CVE-2026-8646","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"8646","Ordinal":"1","Title":"IBM WebSphere Application Server and WebSphere Application Serve","CVE":"CVE-2026-8646","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"8646","Ordinal":"1","NoteData":"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 vulnerable to HTTP request smuggling. A remote attacker could smuggle a specially crafted request to the application server thereby allowing the attacker to bypass security controls, spoof identity, escalate privilege, and expose sensitive information.","Type":"Description","Title":"IBM WebSphere Application Server and WebSphere Application Serve"}]}}}