Apache

CVE-2026-103863: Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Apache Sling Engine. Content-Type, charset, and redirect c

CVE-2026-103863 Nov 5, 2026 Source: Vendor

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.

This issue affects Apache Sling Engine before 3.0.4.

Users are reco

Source of record The credited names below are quoted verbatim from the vendor's own advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-103863

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CVE-2026-103863 BR2026-0000-042537 unclaimed

Credited as The Apache Software Foundation