Information Exposure Vulnerability in Reactor Netty HTTP Server
CVE-2026-47844

5.3MEDIUM

Key Information:

Vendor

Spring

Status
Reactor Netty
Vendor
CVE Published:
26 August 2026

What is CVE-2026-47844?

The Reactor Netty HTTP Server is susceptible to information exposure vulnerabilities, where exception details may be inadvertently leaked across unrelated requests under certain configurations, particularly when Brave Tracing is enabled. This situation can pose serious risks to application security, as it may allow attackers to gain insight into the internal workings and potential weaknesses of the server.

Affected Version(s)

Reactor Netty 1.3.0 <= 1.3.6

Reactor Netty 1.1.0 <= 1.2.18

Reactor Netty 0 <= 1.0.52

References

https://spring.io/security/cve-2026-47844

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.