Spring Security Advisories

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Spring Framework Memory Leak via SETUP Frame in RSocketMessageHandler

MEDIUM | AUGUST 20, 2026 | CVE-2026-47888

Description

A Spring RSocket application is exposed to a memory leak via a malformed SETUP frame.

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
  • 5.2.0 - 5.2.25

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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