CVE-2026-59297 Spring CVE debrief

Who should care

Users of Spring Cloud Function versions 4.2.0 through 4.2.7, 4.3.0 through 4.3.4, and 5.0.0 through 5.0.3 should verify the implementation of the isSecure() call in ServerlessHttpServletRequest and assess potential impacts. This includes operators, platform administrators, vulnerability management teams, and security teams who need to ensure the security of their applications and systems. Additionally, developers who have used Spring Cloud Function in their applications should review the implementation of the isSecure() call to prevent potential security breaches. Security teams should also review compensating controls for exposed systems while remediation is scheduled and verified. Monitoring and detection teams should check relevant logs for exposed assets that need extra review. Asset inventory managers should confirm whether affected product deployments exist in managed environments and assign an owner for follow-up. Those responsible for change management should plan vendor-supported updates or mitigations through normal change control where exposure is confirmed. Those tracking vulnerabilities should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. Those managing rollback or change windows should consider the impact of not verifying the actual scheme on their application and plan accordingly. Those tracking sources should confirm the source of the vulnerability and any additional information provided by the vendor or other sources. Those managing source tracking should review the implementation of the isSecure() call and assess the impact of not verifying the actual scheme on their application. Those managing compensating controls should review compensating controls for exposed systems while remediation is scheduled and verified. Those managing monitoring should check relevant monitoring, detection, and logs for exposed assets that need extra review. Those managing asset inventory should confirm whether affected product deployments exist in managed environments and assign an owner for follow-up. Those managing rollback/change windows should plan vendor-supported updates or mitigations through a

Technical summary

The implementation of the isSecure() call in ServerlessHttpServletRequest does not verify the actual scheme, affecting Spring Cloud Function versions 4.2.0 through 4.2.7, 4.3.0 through 4.3.4, and 5.0.0 through 5.0.3. This vulnerability could potentially allow attackers to bypass security checks. Users should verify the implementation of the isSecure() call and assess the impact of not verifying the actual scheme on their application.

Defensive priority

Verify the implementation of the isSecure() call in ServerlessHttpServletRequest and assess the impact of not verifying the actual scheme on your application.

Recommended defensive actions

• Verify the implementation of the isSecure() call in ServerlessHttpServletRequest
• Assess the impact of not verifying the actual scheme on your application
• Check if your application uses affected Spring Cloud Function versions

Evidence notes

The CVE-2026-59297 record indicates that the implementation of the isSecure() call in ServerlessHttpServletRequest does not verify the actual scheme, affecting Spring Cloud Function versions 4.2.0 - 4.2.7, 4.3.0 - 4.3.4, and 5.0.0 - 5.0.3. Limited information is available on potential exploits or attacks.

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.