{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-8400", "assignerOrgId": "9a959283-ebb5-44b6-b705-dcc2bbced522", "state": "PUBLISHED", "assignerShortName": "ibm", "dateReserved": "2026-05-12T13:57:37.652Z", "datePublished": "2026-08-05T15:58:42.883Z", "dateUpdated": "2026-08-06T03:55:25.879Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "9a959283-ebb5-44b6-b705-dcc2bbced522", "shortName": "ibm", "dateUpdated": "2026-08-05T15:58:42.883Z"}, "title": "Multiple Vulnerabilities in IBM\u00ae Java SDK affect IBM WebSphere Application Server and WebSphere Application Server Liberty due to the July 2026 CPU", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-470", "description": "CWE-470 Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')", "type": "CWE"}]}], "affected": [{"vendor": "IBM", "product": "WebSphere Application Server", "versions": [{"status": "affected", "version": "8.5"}, {"status": 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IBM WebSphere Application Server as noted in the interim fix below then apply the interim fixes:\n\n\n\n\nFor IBM SDK Java Technology Edition Version 8\n\n * For environments that have been upgraded to use the new default IBM SDK Version 8 bundled with IBM WebSphere Application Server Fix Pack 8.5.5.11 or later: Apply the interim fix that resolves DT496796 https://www.ibm.com/support/pages/node/7281415 : Will upgrade you to IBM SDK, Java Technology Edition, Version 8 Service Refresh 8 FP70.\u00a0\n\n\n\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 OR\n\n * Apply IBM Java SDK shipped with IBM WebSphere Application Server Fix pack 31 (8.5.5.31) or later (targeted availability 3Q 2026).\n\n\nFor Application Client for IBM WebSphere Application Server: \n\n\n\nFollow instructions above for the IBM WebSphere Application Server to download the interim fix needed for your version of the Application Client.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p><strong>For IBM WebSphere Application Server Liberty:</strong></p><p>Upgrade to IBM SDK, Java Technology Edition Version 8 SR8 FP70 refer to <a href=\"http://www-01.ibm.com/support/docview.wss?uid=swg27049903\" rel=\"nofollow\">IBM Java SDKs for Liberty </a></p><p><strong>For Version 9 IBM WebSphere Application Server traditional:</strong></p><p>Update to the IBM SDK, Java Technology Edition, Version 8 Service Refresh 8 FP70 using the instructions in the IBM Documentation <a href=\"https://www.ibm.com/support/knowledgecenter/en/SSEQTP_9.0.5/com.ibm.websphere.installation.base.doc/ae/tins_installation_jdk.html\" rel=\"nofollow\">Installing and updating IBM SDK, Java Technology Edition on distributed environments</a> then use the IBM Installation Manager to access the <a href=\"https://www.ibm.com/support/knowledgecenter/SSEQTP_9.0.5/com.ibm.websphere.installation.base.doc/ae/cins_repositories.html\" rel=\"nofollow\">online product repositories</a> to install the SDK or use IBM Installation Manager and access the <a href=\"http://www-01.ibm.com/support/docview.wss?uid=swg24042430\" rel=\"nofollow\">packages from Fixcentral</a>.</p><p><br/><strong>For Version 8.5.0.0 through 8.5.5.30 IBM WebSphere Application Server traditional:\u00a0 </strong></p><p>For the IBM SDK, Java Technology Version that you use, upgrade to the minimal fix pack level of IBM WebSphere Application Server as noted in the interim fix below then apply the interim fixes:</p><p><br/>For IBM SDK Java Technology Edition Version 8</p><ul><li>For environments that have been upgraded to use the new default IBM SDK Version 8 bundled with IBM WebSphere Application Server Fix Pack 8.5.5.11 or later: Apply the interim fix that resolves <a href=\"https://www.ibm.com/support/pages/node/7281415\" rel=\"nofollow\">DT496796</a>: Will upgrade you to IBM SDK, Java Technology Edition, Version 8 Service Refresh 8 FP70.\u00a0</li></ul><p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 OR</p><ul><li>Apply IBM Java SDK shipped with IBM WebSphere Application Server Fix pack 31 (8.5.5.31) or later (targeted availability 3Q 2026).</li></ul><div><strong>For Application Client for IBM WebSphere Application Server: </strong></div><p>Follow instructions above for the IBM WebSphere Application Server to download the interim fix needed for your version of the Application Client.</p>"}]}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-08-05T00:00:00+00:00", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3", "id": "CVE-2026-8400"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-06T03:55:25.879Z"}}]}}

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{"affected": [{"affectedData": [{"cpes": ["cpe:2.3:a:ibm:websphere_application_server:8.5:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:websphere_application_server:8.5.0:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:websphere_application_server:9.0:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:websphere_application_server:9.0.0:*:*:*:*:*:*:*"], "product": "WebSphere Application Server", "vendor": "IBM", "versions": [{"status": "affected", "version": "8.5"}, {"status": "affected", "version": "9.0"}]}, {"cpes": ["cpe:2.3:a:ibm:websphere_application_server_liberty:continuous:*:*:*:*:*:*:*"], "product": "WebSphere Application Server - Liberty", "vendor": "IBM", "versions": [{"status": "affected", "version": "Continuous delivery"}]}], "source": "psirt@us.ibm.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:ibm:websphere_application_server:-:*:*:*:liberty:*:*:*", "matchCriteriaId": "7E0B3D5C-C912-4874-AD3D-62B6E6EBE742", "vulnerable": true}, {"criteria": "cpe:2.3:a:ibm:websphere_application_server:8.5.0.0:*:*:*:-:*:*:*", "matchCriteriaId": "03A3AC1C-36F7-4CED-973B-C0897EC775FD", "vulnerable": true}, {"criteria": "cpe:2.3:a:ibm:websphere_application_server:9.0.0.0:*:*:*:-:*:*:*", "matchCriteriaId": "E79B1229-6DC0-4461-B814-1F671AE0A090", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "IBM WebSphere Application Server 8.5, and 9.0 and IBM WebSphere Application Server - Liberty Continuous delivery has a flaw in the ORB component in IBM SDK, Java Technology Edition, may allow a malicious IIOP server to induce loading and instantation of arbitrary classes."}], "id": "CVE-2026-8400", "lastModified": "2026-08-10T15:57:45.763", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "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:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 5.9, "source": "psirt@us.ibm.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-8400", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-05T00:00:00+00:00", "version": "2.0.3"}}]}, "published": "2026-08-05T16:17:09.657", "references": [{"source": "psirt@us.ibm.com", "tags": ["Vendor Advisory"], "url": "https://www.ibm.com/support/pages/node/7282446"}], "sourceIdentifier": "psirt@us.ibm.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-470"}], "source": "psirt@us.ibm.com", "type": "Secondary"}]}

{"bugzilla": {"description": "java-1.8.0-ibm: Arbitrary class loading and instantiation via malicious IIOP server", "id": "2512497", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2512497"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-470", "details": ["IBM WebSphere Application Server 8.5, and 9.0 and IBM WebSphere Application Server - Liberty Continuous delivery has a flaw in the ORB component in IBM SDK, Java Technology Edition, may allow a malicious IIOP server to induce loading and instantation of arbitrary classes.", "A flaw was found in the ORB (Object Request Broker) component of IBM SDK, Java Technology Edition. A malicious IIOP (Internet Inter-ORB Protocol) server could exploit this vulnerability to force the loading and creation of unauthorized software components. This could lead to the execution of arbitrary code, potentially compromising the affected system."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, ensure that applications are configured to only connect to trusted IIOP servers. Restrict network access to prevent connections to untrusted or external IIOP endpoints."}, "name": "CVE-2026-8400", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "java-1.8.0-ibm", "product_name": "Red Hat Enterprise Linux 8"}], "public_date": "2026-08-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-8400\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-8400\nhttps://www.ibm.com/support/pages/java-sdk-security-vulnerabilities#IBM_Security_Update_July_2026\nhttps://www.ibm.com/support/pages/node/7282446"], "threat_severity": "Important"}