CVEvulnerability

CVE-2026-93567

7.5 HIGH Published 2026-09-18 Modified 2026-10-19 Official page ↗
Status
Awaiting Analysis
Published
2026-09-18
Last modified
2026-10-19
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weaknesses
CWE-20

Description

A flaw was found in Netty's HTTP/2 codec. When converting HTTP/1 CONNECT requests to HTTP/2, the component incorrectly uses the Host header instead of the CONNECT authority-form request-target for the tunnel authority. A remote attacker can exploit this by supplying a different Host header, leading to a malformed HTTP/2 CONNECT request. This can bypass security controls such as tunnel allow-lists or egress policies, resulting in integrity loss.

Related

Weakness · CWE (1)

  • CWE-20 Improper Input Validation weakness

References