CVE-2026-47848

Reactor Netty WebSocket Client Leaks Credentials On Redirect

Published Aug 26, 2026 CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
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

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
References
History
Type Values Removed Values Added
Weaknesses CWE-200
Type Values Removed Values Added
First Time appeared Broadcom
Broadcom reactor Netty
Weaknesses CWE-601
CPEs cpe:2.3:a:broadcom:reactor_netty:*:*:*:*:*:*:*:*
Vendors & Products Broadcom
Broadcom reactor Netty
Type Values Removed Values Added
First Time appeared Spring
Spring reactor Netty
Vendors & Products Spring
Spring reactor Netty
Type Values Removed Values Added
Weaknesses CWE-200
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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
Title Reactor Netty WebSocket Client Leaks Credentials On Redirect
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
vmware
Published
Updated
Aug 26, 2026, 7:44 PM
Reserved
May 20, 2026, 10:00 AM
Status
Analyzed
Published
Aug 26, 2026, 8:17 PM
Modified
Sep 4, 2026, 7:09 PM