CVE-2026-91852
Received Received - Intake

Stored XSS in Apache Sling

Publication date: 2026-09-23

Last updated on: 2026-09-23

Assigner: Apache Software Foundation

Description
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Apache Sling XSS. This issue affects Apache Sling XSS: before 2.4.12. Users are recommended to upgrade to version 2.4.12, which fixes the issue.

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Meta Information

Published
2026-09-23
Last Modified
2026-09-23
Generated
2026-09-23
AI Q&A
2026-09-23
EPSS Evaluated
N/A
NVD
CVE-2026-91852
EUVD
EUVD-2026-85176

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
apache sling_xss to 2.4.12 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

This is a cross-site scripting (XSS) vulnerability in Apache Sling XSS affecting versions before 2.4.12. It allows improper neutralization of input during web page generation, potentially enabling attackers to inject malicious scripts.

Impact Analysis

An attacker could exploit this to execute malicious scripts in a user's browser when visiting a vulnerable page. This may lead to theft of session cookies, account takeover, or defacement of the website.

Compliance Impact

XSS vulnerabilities can lead to unauthorized data access or modification, violating GDPR (data protection) and HIPAA (health data privacy) requirements. Non-compliance may result in legal penalties or reputational damage.

Mitigation Strategies

Upgrade Apache Sling XSS to version 2.4.12 or later to address the cross-site scripting vulnerability.

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