CVE-2026-47836 Spring CVE debrief

Who should care

Organizations using Spring Cloud Config, particularly those with exposed or internet-facing configurations, should be aware of this vulnerability and take steps to mitigate it. This includes reviewing and updating affected systems, monitoring for potential exploitation attempts, and implementing compensating controls where necessary. Security teams and vulnerability management teams should prioritize patching vulnerable versions to prevent potential TOCTOU attacks. Additionally, operators and platform administrators should be aware of the potential risks and take steps to mitigate this vulnerability. The CVE-2026-47836 vulnerability can have a significant impact on an organization's security posture if not properly addressed. Therefore, it is essential to take immediate action to mitigate this vulnerability and prevent potential attacks. This may involve coordinating with vendors, implementing patches, and conducting thorough risk assessments to ensure the security of affected systems. By taking proactive steps, organizations can minimize the risk associated with this vulnerability and protect their assets from potential exploitation. Furthermore, it is crucial to continuously monitor and review the security of affected systems to ensure that the vulnerability is properly mitigated and that no unauthorized access or malicious activity occurs. This requires ongoing vigilance and a proactive approach to security management. By prioritizing the mitigation of this vulnerability, organizations can help prevent potential security breaches and maintain the integrity of their systems and data. Effective communication and collaboration between security teams, operators, and platform administrators are essential to ensure that the necessary steps are taken to mitigate this vulnerability and prevent potential attacks. By working together, organizations can minimize the risk associated with this vulnerability and protect their assets from potential exploitation. The CVE-2026-47836 vulnerability is a significant security concern that requires immediate attention and mitigation to prevent potential attacks and protect organizational assets. Therefore, it is essential to take

Technical summary

The Spring Cloud Config Server's base directory used to clone SVN repositories is vulnerable to time-of-check-time-of-use (TOCTOU) attacks. This affects Spring Cloud Config versions 5.0.0 - 5.0.4, 4.3.0 - 4.3.4, 4.0.0 - 4.2.8, and 3.1.14 and earlier. The vulnerability has a CVSS score of 7.2 and is classified as HIGH severity. The TOCTOU vulnerability can be exploited by an attacker to gain unauthorized access to sensitive data or disrupt service. Organizations using Spring Cloud Config should prioritize patching vulnerable versions to prevent potential TOCTOU attacks.

Defensive priority

Organizations using Spring Cloud Config should prioritize patching vulnerable versions to prevent potential TOCTOU attacks.

Recommended defensive actions

• Patch vulnerable Spring Cloud Config versions to prevent TOCTOU attacks
• Inventory and update affected systems
• Monitor for potential exploitation attempts
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE-2026-47836 record indicates that the base directory used by Spring Cloud Config Server to clone SVN repositories is susceptible to time-of-check-time-of-use (TOCTOU) attacks. Affected versions include Spring Cloud Config 5.0.0 - 5.0.4, 4.3.0 - 4.3.4, 4.0.0 - 4.2.8, and 3.1.14 and earlier. The CVSS score is 7.2 with a HIGH severity.

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.