CVE-2026-47845: medium-severity vulnerability in Spring Reactor Netty
Reactor Netty HTTP Server may incorrectly evaluate proxy addresses
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3epss 0.3%
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Affected products
Spring · Reactor NettyRelated CVEs — Spring Reactor Netty
In the same product, most dangerous first.
CVE-2023-34054MEDIUMReactor Netty HTTP Server Metrics DoS VulnerabilityEPSS 0.9%CVE-2026-47874MEDIUMReactor Netty HTTP Server Denial of Service With Pipelined RequestsEPSS 0.4%CVE-2026-47848MEDIUMReactor Netty WebSocket Client Leaks Credentials On RedirectEPSS 0.3%CVE-2026-47843LOWReactor Netty may incorrectly route traffic due to DNS resolver reuseEPSS 0.3%CVE-2026-47844MEDIUMReactor Netty HTTP Server Leaks Exception DetailsEPSS 0.2%CVE-2026-41715MEDIUMReactor Netty HTTP Client Leaks Credentials On Protocol Downgrade RedirectEPSS 0.2%