Vulnerability in Spring Reactor Netty
CVE-2026-47848
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
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
Affected products
References
Frequently asked questions
- What is CVE-2026-47848?
- CVE-2026-47848 is a medium-severity vulnerability in Spring Reactor Netty, classified under CWE-200 EXPOSURE OF SENSITIVE INFORMATION TO AN UNAUTHORIZED ACTOR. CVSS score: 6.1/10. Published 2026-08-26.
- How severe is CVE-2026-47848?
- Medium severity. CVSS v3 base score is 6.1 out of 10.