Improper Entity Reference Handling in Apache Sling by Apache
CVE-2026-92001

6.1MEDIUM

Key Information:

Vendor

Apache
Status
Apache Sling Xss
Vendor
CVE Published:
23 September 2026

What is CVE-2026-92001?

A significant security vulnerability exists in Apache Sling that involves improper restriction of recursive entity references in Document Type Definitions (DTD). This flaw allows for XML entity expansion, potentially leading to Denial of Service (DoS) through resource exhaustion. Versions prior to 2.4.12 are impacted. Users are strongly advised to upgrade to the latest version to mitigate this risk and enhance their security posture.

Affected Version(s)

Apache Sling XSS 0 < 2.4.12

References

https://lists.apache.org/thread/m52jll26vc8g5jokbg0xt062o...
vendor-advisory

CVSS V3.1

Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

The Apache Software Foundation
Claude Code
.