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VULNERABILITIES

CVE-2026-93567 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://access.redhat.com/errata/RHSA-2026:69440 [email protected]
https://access.redhat.com/errata/RHSA-2026:69470 [email protected]
https://access.redhat.com/errata/RHSA-2026:70257 [email protected]
https://access.redhat.com/security/cve/CVE-2026-93567 [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=2536955 [email protected]

Weakness Enumeration

CWE-IDCWE NameSource
CWE-20Improper Input Validation[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

6 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-93567
NVD Published Date:
Sep 18, 2026
NVD Last Modified:
Sep 22, 2026
Source:
[email protected]
CVE-2026-93567 Details - Not Deferred