CVE-2026-103866

HighCVSS 7.5/10Last modified Nov 10, 2026

Description

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-436 CWE-444

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
Apache Software Foundation	Apache Sling Engine	< 3.0.4

References

Timeline

Published: Nov 5, 2026
Last modified: Nov 10, 2026
NVD status: Received

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