CVE-2026-91999: Apache Sling XSS cross-site scripting (XSS)
This Apache advisory covers CVE-2026-91999 in Apache Sling XSS.
- CVE-2026-91999
Key facts
- Vendor rating
- Medium, CVSS 6.1
- CISA KEV
- Not listed (catalogue checked )
- Affected
- Apache Sling XSS before 2.4.12
- Fixed in
- 2.4.12
- Source published
- Source revised
- Listed by VulniPulse
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Affected products & platforms
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.
Text from the source record.
- Apache Sling XSS before 2.4.12
Official advisory · high-confidence parse· fetched ·verify at source
How to fix CVE-2026-91999
Upgrade to a fixed release named by Apache:
- 2.4.12
Vendor guidance
- Users are recommended to upgrade to version 2.4.12, which fixes the issue.
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