{"id":"CVE-2026-103866","aliases":["EUVD-2026-117433","GHSA-fh7f-x3gj-j2vv"],"status":"published","title":"Apache Sling Engine: Hand-rolled parameter parser diverges from RFC/container parsing, enabling smuggling","description":"Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling') vulnerability in Apache Sling Engine. The engine's query/form parser accepts non-standard percent-escapes, wrong charsets, and continues request processing on such errors.\n\n\n\nThis issue affects Apache Sling Engine: before 3.0.4.\n\n\n\nUsers are recommended to upgrade to version 3.0.4, which fixes the issue.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-12","score":0.00327,"percentile":0.26166,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-436","CWE-444"],"published":"2026-11-05T12:33:00Z","modified":"2026-11-10T15:55:22Z","products":[{"vendor":"apache software foundation","product":"apache sling engine"}],"references":[{"url":"https://lists.apache.org/thread.html/yoftbty2lc7kmtldmyvj7w0m0n1ncbf6","tags":["vendor-advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2026/11/05/8"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-103866"},{"url":"https://github.com/advisories/GHSA-fh7f-x3gj-j2vv"}],"sources":{"cve":[{"id":"CVE-2026-103866","title":"Apache Sling Engine: Hand-rolled parameter parser diverges from RFC/container parsing, enabling smuggling","description":"Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling') vulnerability in Apache Sling Engine. The engine's query/form parser accepts non-standard percent-escapes, wrong charsets, and continues request processing on such errors.\n\n\n\nThis issue affects Apache Sling Engine: before 3.0.4.\n\n\n\nUsers are recommended to upgrade to version 3.0.4, which fixes the issue.","status":"published","published":"2026-11-05T12:33:00.994Z","modified":"2026-11-10T15:55:22.562Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"adp"}],"cwes":["CWE-436","CWE-444"],"updated_at":"2026-11-10T16:39:23.649176Z"}],"euvd":[{"id":"EUVD-2026-117433","description":"Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling') vulnerability in Apache Sling Engine. The engine's query/form parser accepts non-standard percent-escapes, wrong charsets, and continues request processing on such errors.\n\n\n\nThis issue affects Apache Sling Engine: before 3.0.4.\n\n\n\nUsers are recommended to upgrade to version 3.0.4, which fixes the issue.","status":"published","published":"2026-11-05T12:33:00Z","modified":"2026-11-10T15:55:22Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-10T17:21:44.229469Z"}],"ghsa":[{"id":"GHSA-fh7f-x3gj-j2vv","title":"Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling') vulnerability in...","description":"Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling') vulnerability in Apache Sling Engine. The engine's query/form parser accepts non-standard percent-escapes, wrong charsets, and continues request processing on such errors.\n\n\n\nThis issue affects Apache Sling Engine: before 3.0.4.\n\n\n\nUsers are recommended to upgrade to version 3.0.4, which fixes the issue.","status":"published","published":"2026-11-05T15:32:32Z","modified":"2026-11-10T18:32:15Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-436"],"updated_at":"2026-11-10T18:56:11.243058Z"}],"nvd":[{"id":"CVE-2026-103866","description":"Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling') vulnerability in Apache Sling Engine. The engine's query/form parser accepts non-standard percent-escapes, wrong charsets, and continues request processing on such errors.\n\n\n\nThis issue affects Apache Sling Engine: before 3.0.4.\n\n\n\nUsers are recommended to upgrade to version 3.0.4, which fixes the issue.","status":"published","published":"2026-11-05T13:17:07.143Z","modified":"2026-11-12T17:06:26.857Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-436","CWE-444"],"updated_at":"2026-11-10T18:20:09.607808Z"}]}}