CVE-2026-71284 fledge-iot CVE debrief

Who should care

Administrators and users of Fledge's backup-restore feature should be aware of this vulnerability and take steps to patch or mitigate it. This includes reviewing the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. They should also plan vendor-supported updates or mitigations through normal change control where exposure is confirmed and review compensating controls for exposed systems while remediation is scheduled and verified. Additionally, they should check relevant monitoring, detection, and logs for exposed assets that need extra review and track exceptions, retest remediated assets, and close the item only after evidence is documented. The vulnerability affects Fledge's backup-restore feature, which is used by administrators to manage backups and restores. Therefore, administrators and users of this feature should prioritize patching or mitigating this vulnerability to prevent potential arbitrary OS command execution. This may involve restricting access to the upload handler to only trusted administrators and monitoring for suspicious activity related to backup and restore operations. By taking these steps, administrators and users can help prevent potential attacks and protect their systems from exploitation. Furthermore, they should consider the potential operational impact of this vulnerability and take steps to minimize it. This may involve identifying and prioritizing affected systems, developing a remediation plan, and implementing compensating controls to reduce the risk of exploitation. By taking a proactive and informed approach to addressing this vulnerability, administrators and users can help protect their systems and prevent potential attacks. The CVE record provides additional information about the vulnerability, including its CVSS score and severity classification. Administrators and users should review this information and use it to inform their remediation efforts. They should also consider the source-confidence limits of the information provided and take steps to verify the accuracy of the CVE record. By doing so, they can ensure that they have a complete and accurate understanding of the

Technical summary

The upload_backup() function in python/fledge/services/core/api/backup_restore.py is vulnerable to shell command injection. An attacker can inject malicious commands by crafting a backup archive with a filename that satisfies the prefix/suffix match but contains shell command substitutions. This is possible because the function uses string formatting to build a shell command without proper quoting, allowing an attacker to inject malicious commands. The vulnerability has a CVSS score of 7.2 and is classified as HIGH severity.

Defensive priority

Administrators should prioritize patching Fledge's backup-restore upload handler to prevent potential arbitrary OS command execution.

Recommended defensive actions

• Patch Fledge's backup-restore upload handler to prevent arbitrary OS command execution
• Restrict access to the upload handler to only trusted administrators
• Monitor for suspicious activity related to backup and restore operations
• 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
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE description indicates that Fledge's backup-restore upload handler is vulnerable to shell command injection due to improper handling of filenames. The upload_backup() function in python/fledge/services/core/api/backup_restore.py uses string formatting to build a shell command without proper quoting, allowing an attacker to inject malicious commands.

Official resources