Spring Security Advisories

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Dynamic destination cache size is not properly bound in Spring Cloud Stream

LOW | AUGUST 20, 2026 | CVE-2026-59303

Description

Dynamic destination cache size is not properly bound in Spring Cloud Stream

Affected Spring Products and Versions

Spring Cloud Stream:

  • 5.0.0 - 5.0.2
  • 4.3.0 - 4.3.3
  • 4.2.0 - 4.2.6

Mitigation

Users of affected versions should upgrade to the corresponding fixed version.
Fix versionAvailability
5.0.3OSS
4.3.4Enterprise Support Only
4.2.7Enterprise 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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