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CVE-2026-103866: Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling') vulnerability in Apache Sling Engine. The engine's query/form parser accepts no

CVE-2026-103866 Nov 5, 2026 Source: Vendor

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.

Source of record The credited names below are quoted verbatim from the vendor's own advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-103866
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