CVE-2026-23527 — h3 v1 has Request Smuggling (TE.TE) issue
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 st…
Published: 2026-01-15 · CVSS: 8.9 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7