CVE-2026-15634

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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.", "supportingMedia": [{"type": "text/html", "base64": false, "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", "tags": ["vendor-advisory", "patch"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "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"}}], "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\u00b7 Apply Fix Pack 9.0.5.29 SB0030823 (availability September 2026) or later fix pack.\u00a0\n\n\n\nFor V8.5.0.0 through 8.5.5.30:\n\u00b7 Apply Fix Pack 8.5.5.31 https://www.ibm.com/support/pages/node/7285869 (availability September 2026) or later fix pack.\u00a0\n\n\n\n\n\n\n\n\nFor IBM WebSphere Application Server Liberty 17.0.0.3 - 26.0.0.8:\n\u00b7 Apply Liberty Fix Pack 26.0.0.9 https://www.ibm.com/support/pages/node/7285875 (availability September 2026) or later fix pack.", "supportingMedia": [{"type": "text/html", "base64": false, "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>\u00b7 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>\u00b7 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>\u00b7 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"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-15634", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-15T17:21:51.397909Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-15T17:31:48.776Z"}}]}}

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