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.



This issue affects Apache Sling Engine before 3.0.4.



Users are recommended to upgrade to version 3.0.4, which fixes the issue.
Published: 2026-11-05
Score: n/a
EPSS: n/a
KEV: No
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Remediation

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History

Thu, 05 Nov 2026 12:45:00 +0000

Type Values Removed Values Added
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. This issue affects Apache Sling Engine before 3.0.4. Users are recommended to upgrade to version 3.0.4, which fixes the issue.
Title Apache Sling Engine: Include-protection mitigations bypassable via uncovered response-wrapper paths
Weaknesses CWE-693
CWE-79
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-11-05T12:31:45.446Z

Reserved: 2026-10-01T11:44:49.432Z

Link: CVE-2026-103863

cve-icon Vulnrichment

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cve-icon NVD

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cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses
  • CWE-693

    Protection Mechanism Failure

  • CWE-79

    Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')