{"api_version":"1","generated_at":"2026-07-09T01:58:27+00:00","cve":"CVE-2026-11541","urls":{"html":"https://cve.report/CVE-2026-11541","api":"https://cve.report/api/cve/CVE-2026-11541.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-11541","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-11541"},"summary":{"title":"IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by HTTP request smuggling","description":"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.","state":"PUBLISHED","assigner":"ibm","published_at":"2026-06-30 22:16:46","updated_at":"2026-07-02 17:55:28"},"problem_types":["CWE-444","CWE-444 CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"9.8","severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"psirt@us.ibm.com","type":"Secondary","score":"7.4","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","data":{"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"}},{"version":"3.1","source":"CNA","type":"CVSS","score":"7.4","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","data":{"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"}}],"references":[{"url":"https://www.ibm.com/support/pages/node/7277550","name":"https://www.ibm.com/support/pages/node/7277550","refsource":"psirt@us.ibm.com","tags":["Vendor Advisory"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-11541","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-11541","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"IBM","product":"WebSphere Application Server","version":"affected 9.0","platforms":[]},{"source":"CNA","vendor":"IBM","product":"WebSphere Application Server","version":"affected 8.5","platforms":[]},{"source":"CNA","vendor":"IBM","product":"WebSphere Application Server - Liberty","version":"affected 17.0.0.3 26.0.0.6 semver","platforms":[]}],"timeline":[],"solutions":[{"source":"CNA","title":"","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.","time":"","lang":"en"}],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2026","cve_id":"11541","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"ibm","cpe5":"websphere_application_server","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"traditional","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"11541","cve":"CVE-2026-11541","epss":"0.004180000","percentile":"0.335970000","score_date":"2026-07-04","updated_at":"2026-07-05 00:02:27"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-11541","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","timestamp":"2026-07-01T14:52:04.153923Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-07-01T14:52:15.909Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"cpes":["cpe:2.3:a:ibm:websphere_application_server:9.0:*:*:*:*:*:*:*","cpe:2.3:a:ibm:websphere_application_server:9.0.0:*:*:*:*:*:*:*","cpe:2.3:a:ibm:websphere_application_server:8.5:*:*:*:*:*:*:*","cpe:2.3:a:ibm:websphere_application_server:8.5.0:*:*:*:*:*:*:*"],"product":"WebSphere Application Server","vendor":"IBM","versions":[{"status":"affected","version":"9.0"},{"status":"affected","version":"8.5"}]},{"cpes":["cpe:2.3:a:ibm:websphere_application_server___liberty:17.0.0.3:*:*:*:*:*:*:*","cpe:2.3:a:ibm:websphere_application_server___liberty:26.0.0.6:*:*:*:*:*:*:*"],"product":"WebSphere Application Server - Liberty","vendor":"IBM","versions":[{"lessThanOrEqual":"26.0.0.6","status":"affected","version":"17.0.0.3","versionType":"semver"}]}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","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 affected by an HTTP request smuggling vulnerability.

"}],"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 affected by an HTTP request smuggling vulnerability."}],"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":"2026-06-30T20:56:04.135Z","orgId":"9a959283-ebb5-44b6-b705-dcc2bbced522","shortName":"ibm"},"references":[{"tags":["vendor-advisory","patch"],"url":"https://www.ibm.com/support/pages/node/7277550"}],"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 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.

"}],"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."}],"title":"IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by HTTP request smuggling","x_generator":{"engine":"ibm-cvegen"}}},"cveMetadata":{"assignerOrgId":"9a959283-ebb5-44b6-b705-dcc2bbced522","assignerShortName":"ibm","cveId":"CVE-2026-11541","datePublished":"2026-06-30T20:56:04.135Z","dateReserved":"2026-06-08T02:55:08.653Z","dateUpdated":"2026-07-01T14:52:15.909Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-30 22:16:46","lastModifiedDate":"2026-07-02 17:55:28","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},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":5.9}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-07-01T14:52:04.153923Z","id":"CVE-2026-11541","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:traditional:*:*:*","versionStartIncluding":"8.5.0.0","versionEndExcluding":"8.5.5.31","matchCriteriaId":"D0F3A34A-A76C-4929-A3A4-B17271E8B193"},{"vulnerable":true,"criteria":"cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:traditional:*:*:*","versionStartIncluding":"9.0.0.0","versionEndExcluding":"9.0.5.29","matchCriteriaId":"2A4B3C11-FDA8-48D6-997F-48EEA8C3CB2C"},{"vulnerable":true,"criteria":"cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:liberty:*:*:*","versionStartIncluding":"17.0.0.3","versionEndIncluding":"26.0.0.6","matchCriteriaId":"A7115371-D210-4CA1-82E8-36A2B966255A"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"11541","Ordinal":"1","Title":"IBM WebSphere Application Server and WebSphere Application Serve","CVE":"CVE-2026-11541","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"11541","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 affected by an HTTP request smuggling vulnerability.","Type":"Description","Title":"IBM WebSphere Application Server and WebSphere Application Serve"}]}}}