cve-2026-93569

HIGH CVSS 8.2 nvd
Description

A flaw was found in Netty. A remote unauthenticated attacker can exploit a vulnerability in Netty's HTTP/1 to HTTP/2 conversion process. When an HTTP/1 request includes both an absolute-form request-target and a conflicting Host header, Netty incorrectly prioritizes the Host header for the HTTP/2 :authority field, discarding the original request-target authority. This inconsistency can allow an attacker to bypass security controls in Netty-based proxies or gateways, potentially leading to unauthorized access, cache poisoning, or misrouting of requests.

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-444
CVSS metrics
Version Base Severity Vector Exploitability Impact Source
3.1 8.2 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N 3.9 4.2 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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