Spring Security Advisories

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Remote-file synchronizer in Spring Integration writes server-supplied filename under localDirectory without canonicalization

HIGH | JUNE 10, 2026 | CVE-2026-40987

Description

A malicious or compromised FTP/SFTP/SMB server can write arbitrary files anywhere on the client filesystem (outside the configured local-directory) with attacker-controlled content.

Affected Spring Products and Versions

Spring Integration:

  • 7.0.0 - 7.0.4
  • 6.5.0 - 6.5.8
  • 6.4.0 - 6.4.11
  • 6.3.0 - 6.3.14
  • 5.5.20 and earlier

Mitigation

Users of affected versions should upgrade to the corresponding fixed version.
Fix versionAvailability
7.0.4.1Enterprise Support Only
7.0.5OSS
6.5.8.1Enterprise Support Only
6.5.9OSS
6.4.12Enterprise Support Only
6.3.15Enterprise Support Only
5.5.21Enterprise Support Only

No further mitigation steps are necessary.

Credit

The issue was reported responsibly by:

  • M0untainShley
  • SharlongWen
  • daehyuh

References

History

  • 2026-06-10: 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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