Vulnerability · Published Aug 26, 2026 · Assigned by vmware
CVE-2026-47874Reactor Netty HTTP Server Denial of Service With Pipelined Requests
Medium 5.3
In plain English
A medium-severity resource allocation without limits in Reactor Netty from Spring. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.4%top 65.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
The vulnerability occurs when a client sends HTTP/1.1 pipelined requests over a single connection, causing the Reactor Netty HTTP server to consume an excessive amount of memory. Reactor Netty 1.3.0 - 1.3.6 Reactor Netty 1.1.0 - 1.2.18 Reactor Netty 1.0.52 and earlier
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Spring | Reactor Netty | 1.3.0 – through 1.3.61.1.0 – through 1.2.180 – through 1.0.52 |
Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L