CVE-2026-47848 Security Details

CVE ID

CVE-2026-47848

CWE

CWE-601

CVE Description

In specific scenarios involving WebSocket handshake redirects to a different origin, the Reactor Netty WebSocket client may leak credentials. In order for this to happen, the HTTP client must have been explicitly configured to follow redirects. Reactor Netty 1.3.0 - 1.3.6 Reactor Netty 1.1.0 - 1.2.18 Reactor Netty 1.0.52 and earlier

Published

Aug 21, 2026

CVSS Score & Severity

6.0Medium

CVSS Vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:L/VA:N/SC:L/SI:L/SA:N

EPSS Score

0.261%

Malware

malware

KEV Status

Not in KEV Catalog: No known exploits

Vulnerable Methods

reactor/netty/http/client/HttpClientConnect$HttpClientHandler.requestWithBody(Lreactor/netty/http/client/HttpClientOperations;)Lorg/reactivestreams/Publisher;

JVM

Affected Ecosystems

affected

Source

National Vulnerability Database

References

spring.ioPROJECT