Apache Software FoundationCVE-2026-91999
Apache Sling XSS: cross-site scripting
Medium6.1CVE-2026-91999 · Published Sep 23, 2026 · updated Sep 30, 2026
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Apache Sling XSS Product | < 2.4.12 | 2.4.12 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Severity from
- CISA (its enrichment of the CVE record)
- Weakness
- CWE-79
More Apache Software Foundation advisories
All Apache Software Foundation| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 23 | Improper Check for Certificate Revocation vulnerability in Apache Tomcat | Medium6.5 | No fix yet |
| Sep 23 | Apache Tomcat: authentication bypass | Critical9.8 | No fix yet |
| Sep 23 | Apache Tomcat: race condition | High8.1 | No fix yet |
| Sep 23 | Apache Sling XSS: cross-site scripting | Medium6.1 | 2.4.12 |
| Sep 23 | Apache Sling XSS: cross-site scripting | Medium6.1 | 2.4.12 |
| Sep 23 | Apache Sling XSS: cross-site scripting | Medium6.1 | 2.4.12 |