CVE-2026-103866
Published:November 05, 2026
Updated:November 09, 2026
Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling') vulnerability in Apache Sling Engine. The engine's query/form parser accepts non-standard percent-escapes, wrong charsets, and continues request processing on such errors.
This issue affects Apache Sling Engine: before 3.0.4.
Users are recommended to upgrade to version 3.0.4, which fixes the issue.
Affected Packages
https://github.com/apache/sling-org-apache-sling-engine.git (GITHUB):
Affected version(s) >=org.apache.sling.engine-2.3.0 <org.apache.sling.engine-3.0.4 || >=org.apache.sling.engine-3.0.0 <org.apache.sling.engine-3.0.4Fix Suggestion:
Update to version org.apache.sling.engine-3.0.4org.apache.sling:org.apache.sling.engine (JAVA):
Affected version(s) >=2.3.0 <3.0.4 || >=3.0.0 <3.0.4Fix Suggestion:
Update to version 3.0.4Related Resources (2)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.3
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
3.7
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE