Improper Remote IP Address Evaluation in Reactor Netty HTTP Server by Pivotal Software
CVE-2026-47845

5.3MEDIUM

Key Information:

Vendor

Spring

Status
Reactor Netty
Vendor
CVE Published:
26 August 2026

What is CVE-2026-47845?

The Reactor Netty HTTP Server may mistakenly evaluate the remote IP address when the HAProxy Protocol is enabled and configured, potentially leading to improper access control and exposure of sensitive information. This occurs in specific scenarios where the application's setup allows for such misinterpretation of the remote IP data, highlighting the importance of correctly configuring the HAProxy Protocol to safeguard against unintended consequences.

Affected Version(s)

Reactor Netty 1.3.0 <= 1.3.6

Reactor Netty 1.1.0 <= 1.2.18

Reactor Netty 0 <= 1.0.52

References

https://spring.io/security/cve-2026-47845

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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