CVE-2026-46452 Apache CVE debrief

Who should care

Users of Apache NimBLE, particularly those using versions up to 1.9.0, should be aware of this vulnerability and take steps to upgrade to version 1.10.0. This involves reviewing and updating their inventory of affected systems, monitoring for potential exploitation attempts, and ensuring that compensating controls are in place for exposed systems. Additionally, they should confirm whether affected product deployments exist in managed environments and assign an owner for follow-up. It is also crucial to review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Technical summary

The vulnerability is caused by improper input validation in the Mesh Proxy SAR reassembly process of Apache NimBLE. This could lead to the passing of broken data to the application, resulting in memory pressure and unstable parsing behavior. The issue is addressed in version 1.10.0 of Apache NimBLE. Affected users should review and update their inventory of affected systems and monitor for potential exploitation attempts. The vulnerability has a CVSS score of 5.3 and is classified as MEDIUM severity.

Defensive priority

Medium priority should be given to upgrading Apache NimBLE to version 1.10.0, as the vulnerability has a CVSS score of 5.3 and is classified as MEDIUM severity. Users of Apache NimBLE, particularly those using versions up to 1.9.0, should be aware of this vulnerability and take steps to upgrade to version 1.10.0. 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. Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed. Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. Asset inventory and source tracking are also recommended to ensure thorough vulnerability management. Additionally, consider compensating controls and monitoring to mitigate potential risks. It is crucial to verify the effectiveness of these measures and document the process for future reference. Lastly, ensure that all actions taken are in line with organizational policies and procedures for vulnerability management and incident response. Given the medium severity, prioritize actions based on the specific risk assessment of the affected systems and the potential impact on the organization. This approach will help in efficient allocation of resources and minimize potential disruptions. The goal is to enhance the security posture by addressing the vulnerability effectively and efficiently. Therefore, a comprehensive and well-coordinated approach is necessary to manage this vulnerability and reduce associated risks. The implementation of these measures will contribute to a more secure environment and help prevent potential exploitation of the vulnerability. By taking these steps, organizations can better protect their systems and data from potential threats. In conclusion, a proactive and thorough approach is essential to address CVE-2026-46452 effectively and

Recommended defensive actions

• Upgrade Apache NimBLE to version 1.10.0
• Review and update inventory of affected systems
• Monitor for potential exploitation attempts
• 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
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record was published on 2026-07-24T13:18:25.097Z and was last modified on 2026-07-27T14:40:45.187Z. The NVD entry is currently Analyzed. This information is based on the NVD entry and the CVE record. The vulnerability affects Apache NimBLE through version 1.9.0. Users are recommended to upgrade to version 1.10.0, which fixes the issue. Evidence limits suggest that further verification is needed to confirm affected scope and 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.