Bug 2567481 (CVE-2026-103863) - CVE-2026-103863 org.apache.sling/org.apache.sling.engine: Apache Sling Engine: Stored Cross-Site Scripting via header protection bypass
Summary: CVE-2026-103863 org.apache.sling/org.apache.sling.engine: Apache Sling Engine...
Keywords:
Status: NEW
Alias: CVE-2026-103863
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-11-05 22:01 UTC by OSIDB Bzimport
Modified: 2026-11-05 22:31 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-11-05 22:01:23 UTC 
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 recommended to upgrade to version 3.0.4, which fixes the issue.
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