CVE-2026-93569
HIGHCVSS 8.2Description
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:September 18th, 2026 3:17 PM
Last modified:November 4th, 2026 3:17 PM
CVSS Scoring
CVSS v3: 8.2 (HIGH)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
Weaknesses (CWE)
References & Reports
Advisories, patches, and third-party reports
- https://access.redhat.com/errata/RHSA-2026:69440
- https://access.redhat.com/errata/RHSA-2026:69470
- https://access.redhat.com/errata/RHSA-2026:70257
- https://access.redhat.com/errata/RHSA-2026:83612
- https://access.redhat.com/errata/RHSA-2026:95221
- https://access.redhat.com/security/cve/CVE-2026-93569
- https://bugzilla.redhat.com/show_bug.cgi?id=2536962
Source: NIST NVD · Data may lag official sources by up to one minute