Reactor Netty HTTP Client Leaks Credentials On Protocol Downgrade Redirect
CVE-2026-41715

6.1MEDIUM

Key Information:

Vendor

Spring

Status
Reactor Netty
Vendor
CVE Published:
9 June 2026

What is CVE-2026-41715?

In specific scenarios involving HTTP redirects from a secure to an insecure endpoint, the Reactor Netty HTTP client may leak credentials. In order for this to happen, the HTTP client must have been explicitly configured to follow redirects.

Affected versions: Reactor Netty 1.0.0 through 1.0.51; 1.1.0 through 1.1.35; 1.2.0 through 1.2.17; 1.3.0 through 1.3.5.

Affected Version(s)

Reactor Netty 1.0.0 < 1.0.52

Reactor Netty 1.1.0 < 1.1.36

Reactor Netty 1.2.0 < 1.2.18

References

https://spring.io/security/cve-2026-41715

CVSS V3.1

Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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