CVE-2026-8858

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-8858", "assignerOrgId": "9a959283-ebb5-44b6-b705-dcc2bbced522", "state": "PUBLISHED", "assignerShortName": "ibm", "dateReserved": "2026-05-18T18:06:05.131Z", "datePublished": "2026-06-22T14:16:39.629Z", "dateUpdated": "2026-07-09T19:54:33.016Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "9a959283-ebb5-44b6-b705-dcc2bbced522", "shortName": "ibm", "dateUpdated": "2026-07-09T19:54:33.016Z"}, "title": "WebSphere Application Server Remote Code Execution", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-94", "description": "CWE-94 Improper Control of Generation of Code ('Code Injection')", "type": "CWE"}]}], "affected": [{"vendor": "IBM", "product": "WebSphere Application Server", "versions": [{"status": "affected", "version": "8.5"}, {"status": "affected", "version": "9.0"}], "defaultStatus": "unaffected", "cpes": ["cpe:2.3:a:ibm:websphere_application_server:8.5:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:websphere_application_server:9.0:*:*:*:*:*:*:*"]}], "descriptions": [{"lang": "en", "value": "IBM WebSphere Application Server and IBM WebSphere Application Server Liberty are vulnerable to remote code execution and denial of service in the WebSphere Web Server Plug-in component. This vulnerability can be exploited when an attacker impersonates the application server and sends crafted responses to the plug-in.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>IBM WebSphere Application Server and IBM WebSphere Application Server Liberty are vulnerable to remote code execution and denial of service in the WebSphere Web Server Plug-in component. This vulnerability can be exploited when an attacker impersonates the application server and sends crafted responses to the plug-in.</p>"}]}], "references": [{"url": "https://www.ibm.com/support/pages/node/7276560", "tags": ["vendor-advisory", "patch"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "HIGH", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}}], "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 PH71376.\n\n\u00a0\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\u00b7 Upgrade to minimal fix pack levels as required by the interim fix and then apply the Web Server Plug-ins Interim Fix that resolves\u00a0 PH71376 https://www.ibm.com/support/pages/node/7273976 \n--OR--\n\u00b7 Apply Fix Pack 9.0.5.28 or later (targeted availability 2Q2026).\u00a0\u00a0\n\n\n\nFor V8.5.0.0 through 8.5.5.29:\n\u00b7 Upgrade to minimal fix pack levels as required by interim fix and then apply Web Server Plug-ins Interim Fix that resolves\u00a0 PH71376 https://www.ibm.com/support/pages/node/7273976 \n--OR--\n\u00b7 Apply Fix Pack 8.5.5.30 or later (targeted availability 3Q2026).", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>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 PH71376.</p><div>&nbsp;</div><p><strong>Web Server Plug-ins for IBM WebSphere Application Server (used with either WebSphere Application Server traditional or Liberty):</strong></p><p><strong>For V9.0.0.0 through 9.0.5.27:</strong><br>\u00b7 Upgrade to minimal fix pack levels as required by the interim fix and then apply the Web Server Plug-ins Interim Fix that resolves&nbsp;<a href=\"https://www.ibm.com/support/pages/node/7273976\" rel=\"nofollow\">PH71376</a><br>--OR--<br>\u00b7 Apply Fix Pack 9.0.5.28 or later (targeted availability 2Q2026).&nbsp;&nbsp;</p><p><strong>For V8.5.0.0 through 8.5.5.29:</strong><br>\u00b7 Upgrade to minimal fix pack levels as required by interim fix and then apply Web Server Plug-ins Interim Fix that resolves&nbsp;<a href=\"https://www.ibm.com/support/pages/node/7273976\" rel=\"nofollow\">PH71376</a><br>--OR--<br>\u00b7 Apply Fix Pack 8.5.5.30 or later (targeted availability 3Q2026).</p>"}]}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "ibm-cvegen"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-06-23T03:56:00.365269Z", "id": "CVE-2026-8858", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-23T18:48:11.431Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-8858", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-06-23T03:56:00.365269Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-23T18:48:08.374Z"}}], "cna": {"title": "WebSphere Application Server Remote Code Execution", "source": {"discovery": "UNKNOWN"}, "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"cpes": ["cpe:2.3:a:ibm:websphere_application_server:8.5:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:websphere_application_server:9.0:*:*:*:*:*:*:*"], "vendor": "IBM", "product": "WebSphere Application Server", "versions": [{"status": "affected", "version": "8.5"}, {"status": "affected", "version": "9.0"}], "defaultStatus": "unaffected"}], "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 PH71376.\n\n\u00a0\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\u00b7 Upgrade to minimal fix pack levels as required by the interim fix and then apply the Web Server Plug-ins Interim Fix that resolves\u00a0 PH71376 https://www.ibm.com/support/pages/node/7273976 \n--OR--\n\u00b7 Apply Fix Pack 9.0.5.28 or later (targeted availability 2Q2026).\u00a0\u00a0\n\n\n\nFor V8.5.0.0 through 8.5.5.29:\n\u00b7 Upgrade to minimal fix pack levels as required by interim fix and then apply Web Server Plug-ins Interim Fix that resolves\u00a0 PH71376 https://www.ibm.com/support/pages/node/7273976 \n--OR--\n\u00b7 Apply Fix Pack 8.5.5.30 or later (targeted availability 3Q2026).", "supportingMedia": [{"type": "text/html", "value": "<p>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 PH71376.</p><div>&nbsp;</div><p><strong>Web Server Plug-ins for IBM WebSphere Application Server (used with either WebSphere Application Server traditional or Liberty):</strong></p><p><strong>For V9.0.0.0 through 9.0.5.27:</strong><br>\u00b7 Upgrade to minimal fix pack levels as required by the interim fix and then apply the Web Server Plug-ins Interim Fix that resolves&nbsp;<a href=\"https://www.ibm.com/support/pages/node/7273976\" rel=\"nofollow\">PH71376</a><br>--OR--<br>\u00b7 Apply Fix Pack 9.0.5.28 or later (targeted availability 2Q2026).&nbsp;&nbsp;</p><p><strong>For V8.5.0.0 through 8.5.5.29:</strong><br>\u00b7 Upgrade to minimal fix pack levels as required by interim fix and then apply Web Server Plug-ins Interim Fix that resolves&nbsp;<a href=\"https://www.ibm.com/support/pages/node/7273976\" rel=\"nofollow\">PH71376</a><br>--OR--<br>\u00b7 Apply Fix Pack 8.5.5.30 or later (targeted availability 3Q2026).</p>", "base64": false}]}], "references": [{"url": "https://www.ibm.com/support/pages/node/7276560", "tags": ["vendor-advisory", "patch"]}], "x_generator": {"engine": "ibm-cvegen"}, "descriptions": [{"lang": "en", "value": "IBM WebSphere Application Server and IBM WebSphere Application Server Liberty are vulnerable to remote code execution and denial of service in the WebSphere Web Server Plug-in component. 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