Spring Security Advisories

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Spring Framework Request Headers Included in Exception Reasons in HandshakeWebsocketService

LOW | AUGUST 20, 2026 | CVE-2026-47893

Description

A Spring WebFlux application that supports WebSocket connections may expose indirectly sensitive user information by including request headers in an exception reason.

Affected Spring Products and Versions

Spring Framework:

  • 7.0.0 - 7.0.8
  • 6.2.0 - 6.2.19
  • 6.1.0 - 6.1.28
  • 6.0.0 - 6.0.30
  • 5.3.0 - 5.3.49
  • 5.2.25 and earlier

Mitigation

Users of affected versions should upgrade to the corresponding fixed version.
Fix versionAvailability
7.0.9OSS
7.0.8.1Enterprise Support Only
6.2.20Enterprise Support Only
6.1.29Enterprise Support Only
6.0.31Enterprise Support Only
5.3.50Enterprise Support Only
5.2.26Enterprise Support Only

No further mitigation steps are necessary.

References

History

  • 2026-08-20: 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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