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CVE-2026-93567

7.5 high SSVC exploitation: none Published
NVD · CVE.org

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.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 3

  1. StatusAwaiting Analysis → PublishedNVD modified 2026-10-19 10:37
  2. References+1 references (now 6)NVD modified 2026-10-15 17:17
  3. First seenCVSS 7.5NVD modified 2026-10-10 00:17

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 6