Vulnerability · Published Aug 26, 2026 · Assigned by vmware
CVE-2026-47844Reactor Netty HTTP Server Leaks Exception Details
Medium 5.3
In plain English
A medium-severity security flaw 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 0.2% (higher than 16% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.2%top 84.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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
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 |