Bug 2430110 (CVE-2026-23527) - CVE-2026-23527 h3: h3: HTTP Request Smuggling due to improper case-sensitive parsing of Transfer-Encoding header
Summary: CVE-2026-23527 h3: h3: HTTP Request Smuggling due to improper case-sensitive ...
Keywords:
Status: NEW
Alias: CVE-2026-23527
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2430325 2430326
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-01-15 20:01 UTC by OSIDB Bzimport
Modified: 2026-01-16 08:42 UTC (History)
0 users

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Description OSIDB Bzimport 2026-01-15 20:01:20 UTC 
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.
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