{"id":"CVE-2026-3621","state":"PUBLISHED","title":"IBM WebSphere Application Server Liberty is affected by identity spoofing","description":"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.","publishedAt":"2026-04-22T23:07:31.595Z","updatedAt":"2026-04-24T03:55:15.371Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"ibm"},"assigner":"ibm","products":["IBM WebSphere Application Server - Liberty"],"affected":[{"vendor":"IBM","product":"WebSphere Application Server - Liberty","versions":[{"version":"17.0.0.3","status":"affected","lessThanOrEqual":"26.0.0.4","versionType":"semver"}],"cpes":["cpe:2.3:a:ibm:websphere_application_server___liberty:17.0.0.3:*:*:*:*:*:*:*","cpe:2.3:a:ibm:websphere_application_server___liberty:26.0.0.4:*:*:*:*:*:*:*"]}],"references":["https://www.ibm.com/support/pages/node/7270437"],"weaknesses":["CWE-269"],"ingestedAt":"2026-10-29T20:11:50.837Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/3xxx/CVE-2026-3621.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-3621","state":"PUBLISHED","datePublished":"2026-04-22T23:07:31.595Z","dateUpdated":"2026-04-24T03:55:15.371Z","assignerShortName":"ibm","assignerOrgId":"9a959283-ebb5-44b6-b705-dcc2bbced522","dateReserved":"2026-03-05T21:53:23.170Z"},"containers":{"cna":{"title":"IBM WebSphere Application Server Liberty is affected by identity spoofing","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"IBM","product":"WebSphere Application Server - Liberty","versions":[{"version":"17.0.0.3","status":"affected","lessThanOrEqual":"26.0.0.4","versionType":"semver"}],"cpes":["cpe:2.3:a:ibm:websphere_application_server___liberty:17.0.0.3:*:*:*:*:*:*:*","cpe:2.3:a:ibm:websphere_application_server___liberty:26.0.0.4:*:*:*:*:*:*:*"]}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-269","lang":"en","description":"CWE-269 Improper Privilege Management","type":"CWE"}]}],"providerMetadata":{"shortName":"ibm","orgId":"9a959283-ebb5-44b6-b705-dcc2bbced522","dateUpdated":"2026-04-22T23:07:31.595Z"},"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.

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