Apache Sling Engine: Include-protection mitigations bypassable via uncovered response-wrapper paths
CVSS score
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EPSS probability
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Risk score
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Published
1 h ago
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Vulnerability description
DayBreach AI Explanation
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Evidence confidence
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Short explanation
A vulnerability involving improper input neutralization during web page generation leading to cross-site scripting has been reported in Apache Sling Engine (S0). Content-Type, charset, and redirect changes from an included component evade protectheaders and checkcontenttype enforcement, enabling stored XSS (S0). This issue affects versions before 3.0.4, and users are recommended to upgrade to version 3.0.4 (S0).
This vulnerability enables stored XSS attacks despite enabled protections, posing a risk for Apache Sling Engine users (S0).
What should be done?
- Upgrade Apache Sling Engine to version 3.0.4 (S0).
- Follow vendor advisories (S0).
Chain of evidence and sources
Apache Sling Engine içindeki güvenlik açığı, 3.0.4 öncesi sürümleri etkilemektedir.
Kullanıcıların sürüm 3.0.4'e yükseltmesi önerilmektedir.
Show the technical text from the sources
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.
CWE: CWE-79, CWE-693
This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-103863 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | Apache Software Foundation | Apache Sling Engine | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| The sources have not yet published a verified CVSS metric. | ||||
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-103863 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-103863 weaknesses.
Official Sources and Advisories
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Weakness Type (CWE & CAPEC)
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