{"id":"CVE-2026-8620","state":"PUBLISHED","title":"IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by multiple vulnerabilities when using when using Web Server Plug-ins","description":"IBM Web Server Plug-ins for WebSphere Application Server and WebSphere Liberty 8.5, 9.0 IBM WebSphere Application Server and WebSphere Application Server Liberty are vulnerable to HTTP request smuggling in the Web Server Plug-ins through a specially crafted request.","publishedAt":"2026-05-26T17:15:00.501Z","updatedAt":"2026-05-27T13:12:59.224Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N","source":"ibm"},"assigner":"ibm","products":["IBM Web Server Plug-ins for WebSphere Application Server and WebSphere Liberty"],"affected":[{"vendor":"IBM","product":"Web Server Plug-ins for WebSphere Application Server and WebSphere Liberty","versions":[{"version":"8.5, 9.0","status":"affected","lessThanOrEqual":"Interim Fix 002","versionType":"semver"}],"cpes":["cpe:2.3:a:ibm:web_server_plug_ins_for_websphere_application_server_and_websphere_liberty:8.5:*:*:*:*:*:*:*","cpe:2.3:a:ibm:web_server_plug_ins_for_websphere_application_server_and_websphere_liberty:8.5.0:*:*:*:*:*:*:*"]}],"references":["https://www.ibm.com/support/pages/node/7274072"],"weaknesses":["CWE-444"],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/8xxx/CVE-2026-8620.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-8620","state":"PUBLISHED","datePublished":"2026-05-26T17:15:00.501Z","dateUpdated":"2026-05-27T13:12:59.224Z","assignerShortName":"ibm","assignerOrgId":"9a959283-ebb5-44b6-b705-dcc2bbced522","dateReserved":"2026-05-14T18:19:54.491Z"},"containers":{"cna":{"title":"IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by multiple vulnerabilities when using when using Web Server Plug-ins","descriptions":[{"lang":"en","value":"IBM Web Server Plug-ins for WebSphere Application Server and WebSphere Liberty 8.5, 9.0 IBM WebSphere Application Server and WebSphere Application Server Liberty are vulnerable to HTTP request smuggling in the Web Server Plug-ins through a specially crafted request."}],"affected":[{"vendor":"IBM","product":"Web Server Plug-ins for WebSphere Application Server and WebSphere Liberty","versions":[{"version":"8.5, 9.0","status":"affected","lessThanOrEqual":"Interim Fix 002","versionType":"semver"}],"cpes":["cpe:2.3:a:ibm:web_server_plug_ins_for_websphere_application_server_and_websphere_liberty:8.5:*:*:*:*:*:*:*","cpe:2.3:a:ibm:web_server_plug_ins_for_websphere_application_server_and_websphere_liberty:8.5.0:*:*:*:*:*:*:*"]}],"references":[{"url":"https://www.ibm.com/support/pages/node/7274072","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":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"LOW","availabilityImpact":"NONE","baseSeverity":"HIGH","baseScore":7.5,"vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-444","lang":"en","description":"CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')","type":"CWE"}]}],"providerMetadata":{"shortName":"ibm","orgId":"9a959283-ebb5-44b6-b705-dcc2bbced522","dateUpdated":"2026-05-26T17:15:00.501Z"},"solutions":[{"lang":"en","value":"IBM strongly recommends addressing the vulnerability now by applying a currently available Web Server Plug-ins interim fix or fix pack that contains the fix for APAR PH71342. \n\n\n\n\n\n\n\nWeb Server Plug-ins for IBM WebSphere Application Server (used with either WebSphere Application Server traditional or Liberty):\n\n\n\nFor V9.0.0.0 through 9.0.5.27:\n· Upgrade to minimal fix pack levels as required by the interim fix and then apply the Web Server Plug-ins Interim Fix that resolves  PH71342 https://www.ibm.com/support/pages/node/7273976 \n--OR--\n· Apply Web Server Plug-ins Fix Pack 9.0.5.28 or later (targeted availability 2Q2026).  \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 Web Server Plug-ins Interim Fix that resolves  PH71342 https://www.ibm.com/support/pages/node/7273976 \n--OR--\n· Apply Web Server Plug-ins 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.","supportingMedia":[{"type":"text/html","base64":false,"value":"

IBM strongly recommends addressing the vulnerability now by applying a currently available Web Server Plug-ins interim fix or fix pack that contains the fix for APAR PH71342. 

Web Server Plug-ins for IBM WebSphere Application Server (used with either WebSphere Application Server traditional or Liberty):

For V9.0.0.0 through 9.0.5.27:
· Upgrade to minimal fix pack levels as required by the interim fix and then apply the Web Server Plug-ins Interim Fix that resolves PH71342
--OR--
· Apply Web Server Plug-ins Fix Pack 9.0.5.28 or later (targeted availability 2Q2026).  

For V8.5.0.0 through 8.5.5.29:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Web Server Plug-ins Interim Fix that resolves PH71342
--OR--
· Apply Web Server Plug-ins 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.

"}]}],"x_generator":{"engine":"ibm-cvegen"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-27T13:12:49.669182Z","id":"CVE-2026-8620","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-27T13:12:59.224Z"}}]}}}