Vulnerability in Spring Reactor Netty
CVE-2026-47845
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
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
Affected products
References
Frequently asked questions
- What is CVE-2026-47845?
- CVE-2026-47845 is a medium-severity vulnerability in Spring Reactor Netty, classified under CWE-290 AUTHENTICATION BYPASS BY SPOOFING. CVSS score: 5.3/10. Published 2026-08-27.
- How severe is CVE-2026-47845?
- Medium severity. CVSS v3 base score is 5.3 out of 10.