Spring Security Advisories

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Spring Cloud Config Server Susceptible To TOCTOU Attack When Using SVN

HIGH | AUGUST 20, 2026 | CVE-2026-47836

Description

The base directory (spring.cloud.config.server.svn.basedir) used by the Spring Cloud Config Server to clone SVN repositories to is susceptible to time-of-check-time-of-use (TOCTOU) attacks.

Affected Spring Products and Versions

Spring Cloud Config:

  • 5.0.0 - 5.0.4
  • 4.3.0 - 4.3.4
  • 4.0.0 - 4.2.8
  • 3.1.14 and earlier

Mitigation

Users of affected versions should upgrade to the corresponding fixed version.
Fix versionAvailability
5.0.5OSS
4.3.5Enterprise Support Only
4.2.9Enterprise Support Only
3.1.15Enterprise Support Only

No further mitigation steps are necessary.

Credit

The issue was identified and responsibly reported by Sharlong Wen (@Sharlong-Wen).

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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