CLEANSTART-2026-NO09492: In specific scenarios, Reactor Netty HTTP Server may incorrectly evaluate the remote IP address when HAProxy Protocol is enabled

Q: Which deployments are potentially exposed?

Deployments using the affected elasticsearch package may be exposed in scenarios where Reactor Netty HTTP Server has HAProxy Protocol enabled.

Q: What configuration condition is required for this issue to occur?

The issue is described as occurring when HAProxy Protocol is enabled and only in specific scenarios. The provided data does not identify the exact scenarios or affected versions.

Published Nov 7, 2026

Updated

Security vulnerability affects the elasticsearch package. In specific scenarios, Reactor Netty HTTP Server may incorrectly evaluate the remote IP address when HAProxy Protocol is enabled.

Affected Software

1 affected componentFixes available

cleanstart/elasticsearch<9.2.8-r11

9.2.8-r11

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade cleanstart/elasticsearch to a version that resolves this vulnerability.
Fixed in 9.2.8-r11

Event History

Nov 7, 2026

Advisory Published

via OSV·12:38 AM

Data Sourced

via OSV·12:38 AM

DescriptionSeverityAffected Software

Child vulnerabilities

Contains the following vulnerabilities.

CVE-2026-47845

Frequently Asked Questions

Which deployments are potentially exposed?

Deployments using the affected elasticsearch package may be exposed in scenarios where Reactor Netty HTTP Server has HAProxy Protocol enabled.

What configuration condition is required for this issue to occur?

The issue is described as occurring when HAProxy Protocol is enabled and only in specific scenarios. The provided data does not identify the exact scenarios or affected versions.

CLEANSTART-2026-NO09492: In specific scenarios, Reactor Netty HTTP Server may incorrectly evaluate the remote IP address when HAProxy Protocol is enabled

Affected Software

Remediation

Event History

Child vulnerabilities

Frequently Asked Questions

Which deployments are potentially exposed?

What configuration condition is required for this issue to occur?

Company

Resources

Contact

Frequently Asked Questions

Which deployments are potentially exposed?

What configuration condition is required for this issue to occur?