CVE-2026-59293 Spring CVE debrief

Who should care

Security teams responsible for Spring Integration deployments, particularly those using SMB protocol, should review and apply patches to mitigate potential NTLM relay and content-tampering attacks. This includes teams managing affected versions (6.4.0-6.4.12, 6.5.0-6.5.10, 7.0.0-7.0.5, and 7.1.0) and those who need to verify SMB protocol usage in their environment.

Technical summary

The jCIFS client in Spring Integration negotiates down to SMB1/CIFS, which lacks mandatory signing/encryption, making it vulnerable to NTLM relay and content-tampering MITM attacks. Affected versions include Spring Integration 6.4.0-6.4.12, 6.5.0-6.5.10, 7.0.0-7.0.5, and 7.1.0. Security teams should verify the SMB protocol usage in their environment and review vendor advisories for further guidance. The vulnerability allows attackers to perform NTLM relay and content-tampering attacks, potentially leading to unauthorized access and data manipulation.

Defensive priority

Medium-priority defensive review recommended due to potential impact on SMB protocol security.

Recommended defensive actions

• Review and apply vendor patches for affected Spring Integration versions
• Implement compensating controls for SMB protocol security
• Monitor for potential NTLM relay and content-tampering attacks
• Inventory and verify SMB protocol usage in the environment
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed

Evidence notes

Evidence from official CVE and NVD sources indicates potential vulnerability in Spring Integration versions due to SMB1/CIFS negotiation. Further review of vendor advisories recommended. The jCIFS client in Spring Integration negotiates down to SMB1/CIFS, which lacks mandatory signing/encryption, making it vulnerable to NTLM relay and content-tampering MITM attacks. Affected versions include Spring Integration 6.4.0-6.4.12, 6.5.0-6.5.10, 7.0.0-7.0.5, and 7.1.0. Security teams should verify the SMB protocol usage in their environment and review vendor advisories for further guidance.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.