Vulnerability record/PUBLISHED/Published Nov 5, 2026 12:33:00 UTC
CVE-2026-103866
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.
Base score7.5/ 10
SeverityHighCVSS 3.1
Exploitability / impact
CVSS metric breakdown
Base severityHigh
Attack vectorNetworkAV
Attack complexityLowAC
Privileges requiredNonePR
User interactionNoneUI
ScopeUnchangedS
Confidentiality impactNoneC
Integrity impactHighI
Availability impactNoneA
CVSS vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NCVSS communicates standardized severity and impact characteristics. It does not establish whether a system is exploitable in your specific environment.
Record context
CVE Numbering Authorityapache
Last updatedNov 10, 2026 15:55:22 UTC
PublishedNov 5, 2026 12:33:00 UTC
ReservedOct 1, 2026 11:47:21 UTC
Credits
- The Apache Software Foundation
- Claude Code