{"affected":[{"defaultStatus":"unaffected","product":"Apache Sling Engine","source":"CNA: apache","vendor":"Apache Software Foundation","versions":[{"lessThan":"3.0.4","status":"affected","version":"0","versionType":"semver"}]}],"cveId":"CVE-2026-103866","cwes":["CWE-436","CWE-444"],"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.","epss":null,"exploits":[],"kev":null,"metrics":[],"modifiedAt":1793881980994,"publishedAt":1793881980994,"references":[{"source":"CNA: apache","tags":["vendor-advisory"],"url":"https://lists.apache.org/thread.html/yoftbty2lc7kmtldmyvj7w0m0n1ncbf6"}],"remediation":[],"revision":"17cfee17cc775c413c5f08a4b5a5d10cdb610572375a3965fdd7252e13222b33","sources":[{"modifiedAt":1793881980994,"name":"CNA: apache","retrievedAt":1793884183683,"url":"https://www.cve.org/CVERecord?id=CVE-2026-103866"}],"ssvc":null,"status":"published","title":"Apache Sling Engine: Hand-rolled parameter parser diverges from RFC/container parsing, enabling smuggling","updatedAt":1793884183683}