CVE-2026-93566Public exploitNetwork attack vectorHinoki check available

HTTP request smuggling via skipped chunk-line validation

Published Sep 18, 2026 · Updated Sep 18, 2026

HTTP request smuggling in Red Hat products using Netty netty-codec-http allows remote attackers to inject arbitrary HTTP requests. HttpObjectDecoder.checkChunkExtensions returns without running HttpChunkLineValidatingByteProcessor when a chunk-size line lacks a semicolon, so an embedded bare carriage return is accepted. Exploitation requires a reachable HTTP/1.1 endpoint using the affected decoder and enables request-boundary desynchronization with downstream components.

CVSS severity6.5

Medium

EPSS probability0.48%

Next 30 days · Oct 19, 2026

Known exploitationUnconfirmed

Based on sourced intelligence

Hinoki checkAvailable

Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Get started

Summary

What happened

The record

CVE: CVE-2026-93566
Published: Sep 18, 2026
Updated: Sep 18, 2026

Vendor: Commonhaus Foundation
Product: Red Hat JBoss Enterprise Application Platform 8.0
Classifications: CWE-1035, CWE-444, CAPEC-33, T1190

Attack vector: network
Privileges: unauthenticated

Timeline

How it unfolded

Sep 18, 2026CVE publishedPublication date reported by the CVE source.
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 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 AMQ BrokerAffected versions are unavailable in this record.

Commonhaus Foundation · Red Hat AMQ ClientsAffected versions are unavailable in this record.

Published CVSS scores

6.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

6.5Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/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-1035OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities

CWE-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

CAPEC-33HTTP Request Smuggling

T1190Exploit Public-Facing Application

Public exploit references

Netty malformed chunk-size unit-test proof of conceptproof of concept · demonstrated

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started