{"id":"CVE-2026-15396","aliases":["EUVD-2026-78068","GHSA-2fc8-vf8h-jfvw"],"status":"published","title":"IBM WebSphere Application Server IBM WebSphere Application Server - Liberty HTTP Request Smuggling","description":"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.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00367,"percentile":0.30741,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-444"],"published":"2026-09-14T20:08:38Z","modified":"2026-10-22T21:33:33Z","products":[{"vendor":"ibm","product":"websphere application server"},{"vendor":"ibm","product":"websphere application server - liberty"}],"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"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-15396"},{"url":"https://github.com/advisories/GHSA-2fc8-vf8h-jfvw"}],"sources":{"cve":[{"id":"CVE-2026-15396","title":"IBM WebSphere Application Server IBM WebSphere Application Server - Liberty HTTP Request Smuggling","description":"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.","status":"published","published":"2026-09-14T20:08:38.336Z","modified":"2026-10-22T18:55:25.157Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T13:47:39.876248Z"}],"euvd":[{"id":"EUVD-2026-78068","description":"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.","status":"published","published":"2026-09-14T20:08:38Z","modified":"2026-10-22T18:55:25Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T16:59:34.021826Z"}],"ghsa":[{"id":"GHSA-2fc8-vf8h-jfvw","title":"IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty are...","description":"IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty 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.","status":"published","published":"2026-09-14T21:31:43Z","modified":"2026-10-22T21:33:33Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T15:14:18.215402Z"}],"nvd":[{"id":"CVE-2026-15396","description":"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.","status":"published","published":"2026-09-14T20:16:38.153Z","modified":"2026-10-22T19:17:49.977Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T14:12:47.335523Z"}]}}