Spring Security Advisories

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Authentication Leak On Redirect With Reactor Netty HTTP Client

MEDIUM | JULY 15, 2025 | CVE-2025-22227

Description

In some specific scenarios with chained redirects, Reactor Netty HTTP client leaks credentials. In order for this to happen, the HTTP client must have been explicitly configured to follow redirects.

Affected Spring Products and Versions

Reactor Netty:

  • 1.2.0 - 1.2.7
  • 1.1.0 - 1.1.31
  • 1.0.48 and earlier

Mitigation

Users of affected versions should upgrade to the corresponding fixed version.
Fix versionAvailability
1.2.8OSS
1.1.32Enterprise Support Only
1.0.49Enterprise Support Only

No further mitigation steps are necessary.

Credit

The issue was reported responsibly by Martin van Wingerden.

References

History

  • 2025-07-15: Initial vulnerability report published.

Reporting a vulnerability

To report a security vulnerability for a project within the Spring portfolio, see the Security Policy

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