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CVE-2026-103863— Apache Sling Engine: Include-protection mitigations bypassable via uncovered response-wrapper paths

Quick assessment

Affected
Apache Software Foundation Apache Sling Engine
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache Sling Engine 中存在“网页生成期间输入未正确中和”的漏洞（即跨站脚本攻击，XSS）。当包含组件修改 Content-Type、字符集或重定向行为时，可绕过通过 setHeader()、重复调用 setContentType()、字符集相关 API、Servlet 6.1 的重定向重载方法以及过期配置所实施的 protectheaders 和 checkcontenttype 安全强制机制，从而导致即使已启用防护，仍可能发生存储型 XSS 攻击。 此漏洞影响 Apache Sling Eng

AI Predicted 6.1 Difficulty: Moderate
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I. Basic Information for CVE-2026-103863

Vulnerability Information
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Vulnerability Title
Apache Sling Engine: Include-protection mitigations bypassable via uncovered response-wrapper paths
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Sling Engine 0 ~ 3.0.4 -

II. Public POCs for CVE-2026-103863

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III. Intelligence Information for CVE-2026-103863

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Other References for CVE-2026-103863 (1)

Same Patch Batch · Apache Software Foundation · 2026-11-05 · 58 CVEs total

CVE-2026-73098 10.0 CRITICAL Apache Juneau: Unsafe reflection allows attacker-controlled class initialization during pa
CVE-2026-73099 10.0 CRITICAL Apache Juneau: Cross-site request forgery via default-enabled content query-parameter body
CVE-2026-73100 10.0 CRITICAL Apache Juneau: Sensitive request headers logged in cleartext by the default request logger
CVE-2026-73101 10.0 CRITICAL Apache Juneau: Internal exception class and message disclosed via error response header an
CVE-2026-73116 10.0 CRITICAL Apache Juneau: REST client forwards credentials to a different origin when following HTTP
CVE-2026-73117 10.0 CRITICAL Apache Juneau: Response header CRLF injection and open redirect when applications set head
CVE-2026-96677 10.0 CRITICAL Apache Juneau: Cross-site scripting via unescaped request variables in HTML-doc chrome
CVE-2026-121489 10.0 CRITICAL Apache Juneau: Path traversal in DirectoryResource allows reading files outside the config
CVE-2026-73095 8.7 HIGH Apache Juneau: Denial of service via unbounded memory allocation in parsers and REST reque
CVE-2026-103866 Apache Sling Engine: Hand-rolled parameter parser diverges from RFC/container parsing, ena
CVE-2026-97355 Apache OFBiz: Hard-coded Credentials in AdminServer Enable Unauthenticated Denial of Servi
CVE-2026-109837 Apache OFBiz: Authorization Bypass Through User-Controlled Key in Order Returns Enables Cr
CVE-2026-109129 Apache OFBiz: Authorization Bypass Through User-Controlled Key in OrderServices Enables Un
CVE-2026-105461 Apache OFBiz: Missing authorization in updateOrderItems allows view-only users to modify o
CVE-2026-105330 Apache OFBiz: Use of Hard-coded Cryptographic Key in JWT Token Authentication Enables Unau
CVE-2026-105325 Apache OFBiz: Missing authorization in payment application services allows view-only users
CVE-2026-100228 Apache OFBiz: Improper Input Validation in Order Returns Enables Unauthorized Refund Price
CVE-2026-100168 Apache OFBiz: Missing Authorization vulnerability
CVE-2026-97356 Apache OFBiz: Insufficiently Protected Credentials in ViewFile Enable Authentication Bypas
CVE-2026-92887 Apache OFBiz: REST API authentication bypassed by default when the auth attribute is omitt

Showing top 20 of 58 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Apache Sling Engine
Same vendor: Apache Software Foundation
Same weakness: CWE-79