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        "cveId": "CVE-2026-15396",
        "assignerOrgId": "9a959283-ebb5-44b6-b705-dcc2bbced522",
        "state": "PUBLISHED",
        "assignerShortName": "ibm",
        "dateReserved": "2026-07-10T13:16:32.862Z",
        "datePublished": "2026-09-14T20:08:38.336Z",
        "dateUpdated": "2026-10-22T18:55:25.157Z"
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                "orgId": "9a959283-ebb5-44b6-b705-dcc2bbced522",
                "shortName": "ibm",
                "dateUpdated": "2026-10-22T18:55:25.157Z"
            },
            "title": "IBM WebSphere Application Server IBM WebSphere Application Server - Liberty HTTP Request Smuggling",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-444",
                            "description": "CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')",
                            "type": "CWE"
                        }
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                }
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            "affected": [
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                    "vendor": "IBM",
                    "product": "WebSphere Application Server",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "9.0"
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                            "status": "affected",
                            "version": "8.5"
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                    ],
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                    "cpes": [
                        "cpe:2.3:a:ibm:websphere_application_server:9.0:*:*:*:*:*:*:*",
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                        "cpe:2.3:a:ibm:websphere_application_server:8.5:*:*:*:*:*:*:*",
                        "cpe:2.3:a:ibm:websphere_application_server:8.5.0:*:*:*:*:*:*:*"
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                },
                {
                    "vendor": "IBM",
                    "product": "WebSphere Application Server - Liberty",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "17.0.0.3",
                            "lessThanOrEqual": "26.0.0.5",
                            "versionType": "semver"
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                    "lang": "en",
                    "value": "IBM WebSphere Application Server 8.5 and 9.0, and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 are vulnerable to HTTP request smuggling, caused by improper parsing of the HTTP transfer-encoding request header. By sending a specially crafted HTTP transfer-encoding request header, an attacker could exploit this vulnerability to poison the web cache, bypass web application firewall protection, and conduct XSS attacks.",
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                            "value": "<p>IBM WebSphere Application Server 8.5 and 9.0, and IBM WebSphere Application Server - Liberty 17.0.0.3&nbsp;through 26.0.0.8&nbsp;are vulnerable to HTTP request smuggling, caused by improper parsing of the HTTP transfer-encoding request header. By sending a specially crafted HTTP transfer-encoding request header, an attacker could exploit this vulnerability to poison the web cache, bypass web application firewall protection, and conduct XSS attacks.</p>"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://www.ibm.com/support/pages/node/7286610",
                    "tags": [
                        "vendor-advisory",
                        "patch"
                    ]
                },
                {
                    "url": "https://www.ibm.com/support/pages/node/7286611",
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                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
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                    ],
                    "cvssV3_1": {
                        "version": "3.1",
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "LOW",
                        "availabilityImpact": "NONE",
                        "baseSeverity": "MEDIUM",
                        "baseScore": 6.5,
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"
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            "solutions": [
                {
                    "lang": "en",
                    "value": "IBM strongly recommends addressing the vulnerabilities now by applying the fix pack(s) listed below.\n\n\n\nFor IBM WebSphere Application Server traditional:\n\n\n\nFor V9.0.0.0 through 9.0.5.28:\n· Apply Fix Pack  9.0.5.29 SB0030823  (availability September 2026) or later fix pack. \n\n\n\nFor V8.5.0.0 through 8.5.5.30:\n· Apply Fix Pack  8.5.5.31 https://www.ibm.com/support/pages/node/7285869  (availability September 2026) or later fix pack. \n\n\n\n\n\n\n\n\nFor IBM WebSphere Application Server Liberty 17.0.0.3 - 26.0.0.8:\n· Apply Liberty Fix Pack  26.0.0.9 https://www.ibm.com/support/pages/node/7285875  (availability September 2026) or later fix pack.",
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                            "value": "<p>IBM strongly recommends addressing the vulnerabilities now by applying the fix pack(s) listed below.</p><p><strong>For IBM WebSphere Application Server traditional:</strong></p><p><strong>For V9.0.0.0 through 9.0.5.28:</strong><br>· Apply Fix Pack <a href=\"SB0030823\" rel=\"nofollow\">9.0.5.29</a> (availability September 2026) or later fix pack.&nbsp;</p><p><strong>For V8.5.0.0 through 8.5.5.30:</strong><br>· Apply Fix Pack <a href=\"https://www.ibm.com/support/pages/node/7285869\" rel=\"nofollow\">8.5.5.31</a> (availability September 2026) or later fix pack.&nbsp;</p><p><br></p><p><strong>For IBM WebSphere Application Server Liberty 17.0.0.3 - 26.0.0.8:</strong><br>· Apply Liberty Fix Pack <a href=\"https://www.ibm.com/support/pages/node/7285875\" rel=\"nofollow\">26.0.0.9</a> (availability September 2026) or later fix pack.&nbsp;</p>"
                        }
                    ]
                }
            ],
            "source": {
                "discovery": "UNKNOWN"
            },
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                                "timestamp": "2026-09-15T14:37:20.678578Z",
                                "id": "CVE-2026-15396",
                                "options": [
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                                "role": "CISA Coordinator",
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                "title": "CISA ADP Vulnrichment",
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                    "dateUpdated": "2026-09-15T14:37:29.521Z"
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