What’s Vulnerable › Vulnerabilities
CVE-2026-47844: Reactor Netty HTTP Server Leaks Exception Details
- Severity: low (CVSS 3.7 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-26 · updated 2026-09-04
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
- Spring Reactor Netty: before 1.0.53; from 1.1.0 before 1.2.19; from 1.3.0 before 1.3.6.1 — fixed in 1.0.53, 1.2.19, 1.3.6.1
How to fix
Upgrade to a fixed version: Spring Reactor Netty 1.0.53, 1.2.19, 1.3.6.1. Check the vendor advisory for mitigations.
References
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