CVE-2026-41715 PUBLISHED

Reactor Netty HTTP Client Leaks Credentials On Protocol Downgrade Redirect

Assigner: vmware
Reserved: 22.04.2026 Published: 09.06.2026 Updated: 09.06.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS Score: 6.1

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	None	Integrity Impact	Low
User Interaction	Required	Availability Impact	None

CVSS 3.1

Product Status

Vendor	Spring
Product	Reactor Netty
Versions	Default: unaffected affected from 1.0.0 to 1.0.52 (excl.) affected from 1.1.0 to 1.1.36 (excl.) affected from 1.2.0 to 1.2.18 (excl.) affected from 1.3.0 to 1.3.6 (excl.)

References

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

Problem Types

CWE-522: Insufficiently Protected Credentials CWE

Impacts

The Reactor Netty HTTP client may expose credentials when following a redirect from a secure (HTTPS) to an insecure (HTTP) endpoint, leading to information disclosure.