CVE-2026-47848: Undefined Security Weakness

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 -...

PT-2026-82352

Name of the Vulnerable Software and Affected Versions Reactor Core versions 3.8.0 through 3.8.6 Reactor Core versions 3.5.0 through 3.7.19 Reactor Core versions 3.4.41 and earlier Description Applications using the Flux.windowTimeout operator with fairBackpressure enabled are susceptible to a...

PT-2026-82248

Name of the Vulnerable Software and Affected Versions Reactor Netty versions 1.3.0 through 1.3.6 Reactor Netty versions 1.1.0 through 1.2.18 Reactor Netty versions 1.0.52 and earlier Description The Reactor Netty HTTP Server may leak exception details across unrelated requests. This issue occurs...

CVE-2026-47844: Undefined Security Weakness

In specific scenarios, the Reactor Netty HTTP Server may leak exception details across unrelated requests. In order for this to happen, the server must be configured with Brave Tracing. Reactor Netty 1.3.0 - 1.3.6 Reactor Netty 1.1.0 - 1.2.18 Reactor Netty 1.0.52 and earlier...

PT-2026-82247

Name of the Vulnerable Software and Affected Versions Reactor Netty versions 1.3.0 through 1.3.6 Reactor Netty versions 1.1.0 through 1.2.18 Reactor Netty versions 1.0.52 and earlier Description In specific scenarios involving multiple clients with different DNS resolver configurations, the...

PT-2026-82358

Name of the Vulnerable Software and Affected Versions Reactor Netty versions 1.0.0 through 1.0.52 Reactor Netty versions 1.1.0 through 1.2.18 Reactor Netty versions 1.3.0 through 1.3.6 Description An issue exists where the Reactor Netty HTTP server consumes an excessive amount of memory when a...

PT-2026-82347

Name of the Vulnerable Software and Affected Versions Reactor Netty versions 1.0.0 through 1.0.52 Reactor Netty versions 1.1.0 through 1.2.18 Reactor Netty versions 1.3.0 through 1.3.6 Description When the HAProxy Protocol is enabled, the HTTP Server may incorrectly evaluate the remote IP address...

cve-2026-47844 - MEDIUM - Reactor Netty HTTP Server Leaks Exception Details

cve-2026-47844 - MEDIUM - Reactor Netty HTTP Server Leaks Exception Details...

cve-2026-47845 - MEDIUM - Reactor Netty HTTP Server may incorrectly evaluate proxy addresses

cve-2026-47845 - MEDIUM - Reactor Netty HTTP Server may incorrectly evaluate proxy addresses...

cve-2026-47843 - LOW - Reactor Netty may incorrectly route traffic due to DNS resolver reuse

cve-2026-47843 - LOW - Reactor Netty may incorrectly route traffic due to DNS resolver reuse...

cve-2026-47874 - MEDIUM - Reactor Netty HTTP Server Denial of Service With Pipelined Requests

cve-2026-47874 - MEDIUM - Reactor Netty HTTP Server Denial of Service With Pipelined Requests...

cve-2026-47863 - MEDIUM - Reactor Core bufferTimeout fair-backpressure pipeline permanently hangs when upstream delivers items during an active flush

cve-2026-47863 - MEDIUM - Reactor Core bufferTimeout fair-backpressure pipeline permanently hangs when upstream delivers items during an active flush...

cve-2026-47848 - MEDIUM - Reactor Netty WebSocket Client Leaks Credentials On Redirect

cve-2026-47848 - MEDIUM - Reactor Netty WebSocket Client Leaks Credentials On Redirect...

cve-2026-47857 - MEDIUM - Reactor Core windowTimeout fair-backpressure stream hang due to 20-bit index wrap-around

cve-2026-47857 - MEDIUM - Reactor Core windowTimeout fair-backpressure stream hang due to 20-bit index wrap-around...

Use of Incorrectly-Resolved Name or Reference

Overview Affected versions of this package are vulnerable to Use of Incorrectly-Resolved Name or Reference in the process of handling DNS resolution when multiple clients with different DNS resolver configurations are dynamically created. An attacker can cause traffic to be routed to unintended...

User Impersonation

Overview Affected versions of this package are vulnerable to User Impersonation in the evaluation of the remote IP address when the HAProxy Protocol is enabled. An attacker can bypass IP-based access controls by sending specially crafted requests. Note: This is only exploitable if the application...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the handling of HTTP/1.1 pipelined requests over a single connection. An attacker can cause excessive memory consumption by sending multiple pipelined requests, potentially leading...

Open Redirect

Overview Affected versions of this package are vulnerable to Open Redirect in scenarios where a WebSocket handshake is redirected to a different origin and the HTTP client is explicitly configured to follow redirects. An attacker can obtain sensitive credentials by leveraging crafted redirect...

Race Condition

Overview Affected versions of this package are vulnerable to Race Condition in the Flux.bufferTimeout process with fairBackpressure enabled when a race condition occurs between flushing buffered items and the arrival of new upstream items. An attacker can cause the stream to hang indefinitely and...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the Flux.windowTimeout function when fairBackpressure is enabled. An attacker can cause the stream to hang indefinitely and exhaust system resources by maintaining long-lived...