{"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-2026-103863","cwes":["CWE-79","CWE-693"],"description":"Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Apache Sling Engine. Content-Type, charset, and redirect changes from an included component evade the  protectheaders / checkcontenttype  enforcement through setHeader(), repeated calls to setContentType(), the charset APIs, Servlet 6.1 redirect overloads, and stale config - enabling stored XSS despite enabled protections.\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":1793881905446,"publishedAt":1793881905446,"references":[{"source":"CNA: apache","tags":["vendor-advisory"],"url":"https://lists.apache.org/thread.html/rll7kjtbpj2lvh4nzmrw5sdmqww64ldg"}],"remediation":[],"revision":"873895ef764bda663f9231aa04a8d4800fc2065f96e4ff72d6ada3b75ad7b714","sources":[{"modifiedAt":1793881905446,"name":"CNA: apache","retrievedAt":1793884178133,"url":"https://www.cve.org/CVERecord?id=CVE-2026-103863"}],"ssvc":null,"status":"published","title":"Apache Sling Engine: Include-protection mitigations bypassable via uncovered response-wrapper paths","updatedAt":1793884178133}