CVE-2026-93567Public exploitNetwork attack vector

Tunnel policy bypass via Host-controlled authority

Published Sep 18, 2026 · Updated Sep 18, 2026

Improper input validation in Netty netty-codec-http2 allows remote attackers to bypass CONNECT tunnel policy via a conflicting Host header. HttpConversionUtil.toHttp2Headers applies generic request conversion to authority-form CONNECT requests, copies Host into :authority, and emits forbidden :scheme and :path pseudo-headers. Exploitation requires a Netty-based HTTP/1-to-HTTP/2 proxy or gateway and permits tunneling to an unintended upstream target without code execution or memory corruption.

CVSS severity7.5
High
EPSS probability2.56%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Netty netty-codec-http2 allows remote attackers to bypass CONNECT tunnel policy via a conflicting Host header. HttpConversionUtil.toHttp2Headers applies generic request conversion to authority-form CONNECT requests, copies Host into :authority, and emits forbidden :scheme and :path pseudo-headers. Exploitation requires a Netty-based HTTP/1-to-HTTP/2 proxy or gateway and permits tunneling to an unintended upstream target without code execution or memory corruption.

The record

CVE
CVE-2026-93567
Published
Sep 18, 2026
Updated
Sep 18, 2026
Vendor
Commonhaus Foundation
Product
Red Hat JBoss Enterprise Application Platform 7
Classifications
CWE-20, T1090
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Commonhaus Foundation · Red Hat JBoss Enterprise Application Platform 7Affected versions are unavailable in this record.
Commonhaus Foundation · Red Hat AMQ Broker 7Affected versions are unavailable in this record.
Commonhaus Foundation · Red Hat build of Apache Camel for Spring Boot 4Affected versions are unavailable in this record.
Commonhaus Foundation · Red Hat build of KeycloakAffected versions are unavailable in this record.
Commonhaus Foundation · Red Hat Single Sign-On 7Affected versions are unavailable in this record.
Commonhaus Foundation · Red Hat Data Grid 8Affected versions are unavailable in this record.
Commonhaus Foundation · Red Hat JBoss Enterprise Application Platform 8.0Affected versions are unavailable in this record.
Commonhaus Foundation · Red Hat build of Apache Camel 4 for Quarkus 3Affected versions are unavailable in this record.
Commonhaus Foundation · Red Hat Fuse 7Affected versions are unavailable in this record.
Commonhaus Foundation · Red Hat build of Debezium 3Affected versions are unavailable in this record.
Commonhaus Foundation · Red Hat build of QuarkusAffected versions are unavailable in this record.
Commonhaus Foundation · Red Hat build of Apicurio Registry 3Affected versions are unavailable in this record.

Published CVSS scores

7.5Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
T1090Proxy

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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