CVE-2026-93569Public exploitNetwork attack vector

Security control bypass via Host authority overwrite

Published Sep 18, 2026 · Updated Sep 18, 2026

HTTP authority confusion in Red Hat Data Grid 8 allows remote attackers to bypass proxy or gateway controls with conflicting host data. Netty HttpConversionUtil.toHttp2Headers reads a conflicting HTTP/1 Host header and writes it as HTTP/2 :authority instead of preserving the absolute-form request-target authority. Exploitation requires a deployment that checks the request-target before this conversion; it can cross host or tenant boundaries, poison caches, or misroute requests.

CVSS severity8.2
High
EPSS probability2.19%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTTP authority confusion in Red Hat Data Grid 8 allows remote attackers to bypass proxy or gateway controls with conflicting host data. Netty HttpConversionUtil.toHttp2Headers reads a conflicting HTTP/1 Host header and writes it as HTTP/2 :authority instead of preserving the absolute-form request-target authority. Exploitation requires a deployment that checks the request-target before this conversion; it can cross host or tenant boundaries, poison caches, or misroute requests.

The record

CVE
CVE-2026-93569
Published
Sep 18, 2026
Updated
Sep 18, 2026
Vendor
Commonhaus Foundation
Product
Red Hat Data Grid 8
Classifications
CWE-444, T1190
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 Data Grid 8Affected versions are unavailable in this record.

Published CVSS scores

8.2Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
T1190Exploit Public-Facing Application

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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