cve-2026-93567

HIGH CVSS 7.5 nvd
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.

Timeline
Published
2026-09-18
Last Modified
2026-11-04
CVSS Details
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
Affected Products

No product information available.

Weaknesses (CWE)
CWE-20
CVSS metrics
Version Base Severity Vector Exploitability Impact Source
3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N 3.9 3.6 secalert@redhat.com
NVD metadata
NVD status
Awaiting Analysis
Source identifier
secalert@redhat.com
References
Linked Vulnerabilities
cpuoct2026csaf csaf_oracle 

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Enrichment data
EPSS
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CISA KEV
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Aggregated bundle (all enrichments)
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