---
id: CVE-2026-91852
title: >-
  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 f…
summary: >-
  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 f…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: Apache Software Foundation
product: Apache Sling XSS
affected:
  - apache_sling_xss < 2.4.12
published: '2026-09-23'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T17:58:26.570'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-91852'
references:
  - url: 'https://lists.apache.org/thread/nd0ncdk5qb9gqvn0s10rmhnbk887k1qo'
    label: security@apache.org
  - url: 'https://sling.apache.org/news.html'
    label: security@apache.org
  - url: 'http://www.openwall.com/lists/oss-security/2026/09/23/12'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
epss: 0.00206
epssPercentile: 0.09329
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-23T14:04:21.554097Z'
ingestedAt: '2026-09-23T10:21:54.374Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.