CVE-2026-47845

Reactor Netty HTTP Server may incorrectly evaluate proxy addresses

State: Published
Severity: 5.3 Medium
Published: Aug 26, 2026
Updated: Aug 27, 2026
Reserved: May 20, 2026

Description

In specific scenarios, Reactor Netty HTTP Server may incorrectly evaluate the remote IP address when HAProxy Protocol is enabled. In order for this to happen, the application must be configured to use HAProxy Protocol. Reactor Netty 1.3.0 - 1.3.6 Reactor Netty 1.1.0 - 1.2.18 Reactor Netty 1.0.52 and earlier

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	vmware

Weaknesses

CWE-290 Authentication Bypass by Spoofing

Affected Products

Product	Versions
Reactor NettySpring	1.3.0 through 1.3.6Affected 1.1.0 through 1.2.18Affected 1.0.52 and earlierAffected

References

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

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