AUGUST 4, 2026
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Case File

CVE-2026-23527

HIGH · CVSS 8.9 EPSS 0.58% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2026-01-15 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 8.9. Public exploit code or proof-of-concept references have been detected in its references.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-23527
Severity
HIGH
CVSS
8.9
EPSS
0.58%

Original NVD Description

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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