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Threat Entry
Updated 2026-01-23
CVE-2026-23527 - H3 Plugin
H3 is a minimal H(TTP) framework built for high performance and portability. Prior to 1.15.5, there is a critical HTTP Request Smuggling vulnerability. readRawBody is doing a strict case-sensitive check for the Transfer-Encoding header. It explicitly looks for "chunked", but per the RFC, this header should be case-insensitive. This vulnerability is fixed in 1.15.5.
PLUGIN
H3
CVE-2026-23527
Risk Score